Home / 85,809,706.05-128,714,559.08-76,403,856.45

Finding the Fourth Proportional to 85,809,706.05, 128,714,559.08 and 76,403,856.45

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Solution

The fourth proportional to 85,809,706.05, 128,714,559.08 and 76,403,856.45 is: 114,605,784.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,809,706.05 : 128,714,559.08 = 76,403,856.45 : x
  2. Step 2: Convert to fraction form
    85,809,706.05/128,714,559.08 = 76,403,856.45/x
  3. Step 3: Cross multiply
    85,809,706.05x = 128,714,559.08 × 76,403,856.45
  4. Step 4: Simplify right side
    85,809,706.05x = 9,834,288,694,591,346
  5. Step 5: Solve for x
    x = 9,834,288,694,591,346/85,809,706.05
  6. Step 6: Final answer
    x = 114,605,784.68

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.