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Finding the Fourth Proportional to 101,209.53, 139,673.31 and 62,991.71

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Solution

The fourth proportional to 101,209.53, 139,673.31 and 62,991.71 is: 86,931.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,209.53 : 139,673.31 = 62,991.71 : x
  2. Step 2: Convert to fraction form
    101,209.53/139,673.31 = 62,991.71/x
  3. Step 3: Cross multiply
    101,209.53x = 139,673.31 × 62,991.71
  4. Step 4: Simplify right side
    101,209.53x = 8,798,260,581.78
  5. Step 5: Solve for x
    x = 8,798,260,581.78/101,209.53
  6. Step 6: Final answer
    x = 86,931.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.