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Finding the Fourth Proportional to 103,137.28, 142,329.28 and 62,851.20

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Solution

The fourth proportional to 103,137.28, 142,329.28 and 62,851.20 is: 86,734.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,137.28 : 142,329.28 = 62,851.20 : x
  2. Step 2: Convert to fraction form
    103,137.28/142,329.28 = 62,851.20/x
  3. Step 3: Cross multiply
    103,137.28x = 142,329.28 × 62,851.20
  4. Step 4: Simplify right side
    103,137.28x = 8,945,566,043.14
  5. Step 5: Solve for x
    x = 8,945,566,043.14/103,137.28
  6. Step 6: Final answer
    x = 86,734.55

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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.