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Finding the Fourth Proportional to 52,689.20, 78,841.80 and 38,865.20

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Solution

The fourth proportional to 52,689.20, 78,841.80 and 38,865.20 is: 58,156.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,689.20 : 78,841.80 = 38,865.20 : x
  2. Step 2: Convert to fraction form
    52,689.20/78,841.80 = 38,865.20/x
  3. Step 3: Cross multiply
    52,689.20x = 78,841.80 × 38,865.20
  4. Step 4: Simplify right side
    52,689.20x = 3,064,202,325.36
  5. Step 5: Solve for x
    x = 3,064,202,325.36/52,689.20
  6. Step 6: Final answer
    x = 58,156.17

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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.