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Finding the Fourth Proportional to 101,679.12, 152,520.12 and 31,554

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Solution

The fourth proportional to 101,679.12, 152,520.12 and 31,554 is: 47,331.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,679.12 : 152,520.12 = 31,554 : x
  2. Step 2: Convert to fraction form
    101,679.12/152,520.12 = 31,554/x
  3. Step 3: Cross multiply
    101,679.12x = 152,520.12 × 31,554
  4. Step 4: Simplify right side
    101,679.12x = 4,812,619,866.48
  5. Step 5: Solve for x
    x = 4,812,619,866.48/101,679.12
  6. Step 6: Final answer
    x = 47,331.45

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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.