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Finding the Fourth Proportional to 66,828.72, 92,013.24 and 56,737.20

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Solution

The fourth proportional to 66,828.72, 92,013.24 and 56,737.20 is: 78,118.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,828.72 : 92,013.24 = 56,737.20 : x
  2. Step 2: Convert to fraction form
    66,828.72/92,013.24 = 56,737.20/x
  3. Step 3: Cross multiply
    66,828.72x = 92,013.24 × 56,737.20
  4. Step 4: Simplify right side
    66,828.72x = 5,220,573,600.53
  5. Step 5: Solve for x
    x = 5,220,573,600.53/66,828.72
  6. Step 6: Final answer
    x = 78,118.71

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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.