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Finding the Fourth Proportional to 85,756.83, 128,635.29 and 35,809.71

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Solution

The fourth proportional to 85,756.83, 128,635.29 and 35,809.71 is: 53,714.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,756.83 : 128,635.29 = 35,809.71 : x
  2. Step 2: Convert to fraction form
    85,756.83/128,635.29 = 35,809.71/x
  3. Step 3: Cross multiply
    85,756.83x = 128,635.29 × 35,809.71
  4. Step 4: Simplify right side
    85,756.83x = 4,606,392,430.67
  5. Step 5: Solve for x
    x = 4,606,392,430.67/85,756.83
  6. Step 6: Final answer
    x = 53,714.58

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1.5x scale

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.