Home / 102,472.20-153,445.50-86,725.80

Finding the Fourth Proportional to 102,472.20, 153,445.50 and 86,725.80

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Solution

The fourth proportional to 102,472.20, 153,445.50 and 86,725.80 is: 129,866.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,472.20 : 153,445.50 = 86,725.80 : x
  2. Step 2: Convert to fraction form
    102,472.20/153,445.50 = 86,725.80/x
  3. Step 3: Cross multiply
    102,472.20x = 153,445.50 × 86,725.80
  4. Step 4: Simplify right side
    102,472.20x = 13,307,683,743.90
  5. Step 5: Solve for x
    x = 13,307,683,743.90/102,472.20
  6. Step 6: Final answer
    x = 129,866.28

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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.