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Finding the Fourth Proportional to 66,702.60, 92,061.96 and 42,859.08

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Solution

The fourth proportional to 66,702.60, 92,061.96 and 42,859.08 is: 59,153.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,702.60 : 92,061.96 = 42,859.08 : x
  2. Step 2: Convert to fraction form
    66,702.60/92,061.96 = 42,859.08/x
  3. Step 3: Cross multiply
    66,702.60x = 92,061.96 × 42,859.08
  4. Step 4: Simplify right side
    66,702.60x = 3,945,690,908.60
  5. Step 5: Solve for x
    x = 3,945,690,908.60/66,702.60
  6. Step 6: Final answer
    x = 59,153.48

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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.