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Finding the Fourth Proportional to 138,862.80, 208,294.20 and 130,114.80

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Solution

The fourth proportional to 138,862.80, 208,294.20 and 130,114.80 is: 195,172.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,862.80 : 208,294.20 = 130,114.80 : x
  2. Step 2: Convert to fraction form
    138,862.80/208,294.20 = 130,114.80/x
  3. Step 3: Cross multiply
    138,862.80x = 208,294.20 × 130,114.80
  4. Step 4: Simplify right side
    138,862.80x = 27,102,158,174.16
  5. Step 5: Solve for x
    x = 27,102,158,174.16/138,862.80
  6. Step 6: Final answer
    x = 195,172.20

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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.