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Finding the Fourth Proportional to 139,702.68, 209,554.20 and 34,520.04

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Solution

The fourth proportional to 139,702.68, 209,554.20 and 34,520.04 is: 51,780.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,702.68 : 209,554.20 = 34,520.04 : x
  2. Step 2: Convert to fraction form
    139,702.68/209,554.20 = 34,520.04/x
  3. Step 3: Cross multiply
    139,702.68x = 209,554.20 × 34,520.04
  4. Step 4: Simplify right side
    139,702.68x = 7,233,819,366.17
  5. Step 5: Solve for x
    x = 7,233,819,366.17/139,702.68
  6. Step 6: Final answer
    x = 51,780.10

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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.