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Finding the Fourth Proportional to 268,079.87, 402,100.64 and 155,689.94

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Solution

The fourth proportional to 268,079.87, 402,100.64 and 155,689.94 is: 233,523.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,079.87 : 402,100.64 = 155,689.94 : x
  2. Step 2: Convert to fraction form
    268,079.87/402,100.64 = 155,689.94/x
  3. Step 3: Cross multiply
    268,079.87x = 402,100.64 × 155,689.94
  4. Step 4: Simplify right side
    268,079.87x = 62,603,023,737.11
  5. Step 5: Solve for x
    x = 62,603,023,737.11/268,079.87
  6. Step 6: Final answer
    x = 233,523.78

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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.