Home / 103,688.10-155,532.15-72,031.28

Finding the Fourth Proportional to 103,688.10, 155,532.15 and 72,031.28

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Solution

The fourth proportional to 103,688.10, 155,532.15 and 72,031.28 is: 108,046.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,688.10 : 155,532.15 = 72,031.28 : x
  2. Step 2: Convert to fraction form
    103,688.10/155,532.15 = 72,031.28/x
  3. Step 3: Cross multiply
    103,688.10x = 155,532.15 × 72,031.28
  4. Step 4: Simplify right side
    103,688.10x = 11,203,179,067.99
  5. Step 5: Solve for x
    x = 11,203,179,067.99/103,688.10
  6. Step 6: Final answer
    x = 108,046.91

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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.