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Finding the Fourth Proportional to 87,307.74, 130,973.76 and 28,123.47

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Solution

The fourth proportional to 87,307.74, 130,973.76 and 28,123.47 is: 42,189.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,307.74 : 130,973.76 = 28,123.47 : x
  2. Step 2: Convert to fraction form
    87,307.74/130,973.76 = 28,123.47/x
  3. Step 3: Cross multiply
    87,307.74x = 130,973.76 × 28,123.47
  4. Step 4: Simplify right side
    87,307.74x = 3,683,436,610.15
  5. Step 5: Solve for x
    x = 3,683,436,610.15/87,307.74
  6. Step 6: Final answer
    x = 42,189.12

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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.