Home / 85,809,629.80-128,714,444.70-76,403,780.20

Finding the Fourth Proportional to 85,809,629.80, 128,714,444.70 and 76,403,780.20

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Solution

The fourth proportional to 85,809,629.80, 128,714,444.70 and 76,403,780.20 is: 114,605,670.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,809,629.80 : 128,714,444.70 = 76,403,780.20 : x
  2. Step 2: Convert to fraction form
    85,809,629.80/128,714,444.70 = 76,403,780.20/x
  3. Step 3: Cross multiply
    85,809,629.80x = 128,714,444.70 × 76,403,780.20
  4. Step 4: Simplify right side
    85,809,629.80x = 9,834,270,141,423,856
  5. Step 5: Solve for x
    x = 9,834,270,141,423,856/85,809,629.80
  6. Step 6: Final answer
    x = 114,605,670.30

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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.