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Finding the Fourth Proportional to 85,737.28, 128,397.28 and 59,368

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Solution

The fourth proportional to 85,737.28, 128,397.28 and 59,368 is: 88,907.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,737.28 : 128,397.28 = 59,368 : x
  2. Step 2: Convert to fraction form
    85,737.28/128,397.28 = 59,368/x
  3. Step 3: Cross multiply
    85,737.28x = 128,397.28 × 59,368
  4. Step 4: Simplify right side
    85,737.28x = 7,622,689,719.04
  5. Step 5: Solve for x
    x = 7,622,689,719.04/85,737.28
  6. Step 6: Final answer
    x = 88,907.53

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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.