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Finding the Fourth Proportional to 157,431.80, 236,147.70 and 124,254.20

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Solution

The fourth proportional to 157,431.80, 236,147.70 and 124,254.20 is: 186,381.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,431.80 : 236,147.70 = 124,254.20 : x
  2. Step 2: Convert to fraction form
    157,431.80/236,147.70 = 124,254.20/x
  3. Step 3: Cross multiply
    157,431.80x = 236,147.70 × 124,254.20
  4. Step 4: Simplify right side
    157,431.80x = 29,342,343,545.34
  5. Step 5: Solve for x
    x = 29,342,343,545.34/157,431.80
  6. Step 6: Final answer
    x = 186,381.30

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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.