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Finding the Fourth Proportional to 261,702.40, 392,553.60 and 74,689.60

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Solution

The fourth proportional to 261,702.40, 392,553.60 and 74,689.60 is: 112,034.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,702.40 : 392,553.60 = 74,689.60 : x
  2. Step 2: Convert to fraction form
    261,702.40/392,553.60 = 74,689.60/x
  3. Step 3: Cross multiply
    261,702.40x = 392,553.60 × 74,689.60
  4. Step 4: Simplify right side
    261,702.40x = 29,319,671,362.56
  5. Step 5: Solve for x
    x = 29,319,671,362.56/261,702.40
  6. Step 6: Final answer
    x = 112,034.40

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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.