Home / 103,411.10-155,116.65-67,981.70

Finding the Fourth Proportional to 103,411.10, 155,116.65 and 67,981.70

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Solution

The fourth proportional to 103,411.10, 155,116.65 and 67,981.70 is: 101,972.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,411.10 : 155,116.65 = 67,981.70 : x
  2. Step 2: Convert to fraction form
    103,411.10/155,116.65 = 67,981.70/x
  3. Step 3: Cross multiply
    103,411.10x = 155,116.65 × 67,981.70
  4. Step 4: Simplify right side
    103,411.10x = 10,545,093,565.31
  5. Step 5: Solve for x
    x = 10,545,093,565.31/103,411.10
  6. Step 6: Final answer
    x = 101,972.55

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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.