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Finding the Fourth Proportional to 142,328.68, 213,485.72 and 42,489.70

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Solution

The fourth proportional to 142,328.68, 213,485.72 and 42,489.70 is: 63,732.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,328.68 : 213,485.72 = 42,489.70 : x
  2. Step 2: Convert to fraction form
    142,328.68/213,485.72 = 42,489.70/x
  3. Step 3: Cross multiply
    142,328.68x = 213,485.72 × 42,489.70
  4. Step 4: Simplify right side
    142,328.68x = 9,070,943,450.92
  5. Step 5: Solve for x
    x = 9,070,943,450.92/142,328.68
  6. Step 6: Final answer
    x = 63,732.37

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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.