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Finding the Fourth Proportional to 123,708.91, 185,472.57 and 39,420.58

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Solution

The fourth proportional to 123,708.91, 185,472.57 and 39,420.58 is: 59,101.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,708.91 : 185,472.57 = 39,420.58 : x
  2. Step 2: Convert to fraction form
    123,708.91/185,472.57 = 39,420.58/x
  3. Step 3: Cross multiply
    123,708.91x = 185,472.57 × 39,420.58
  4. Step 4: Simplify right side
    123,708.91x = 7,311,436,283.49
  5. Step 5: Solve for x
    x = 7,311,436,283.49/123,708.91
  6. Step 6: Final answer
    x = 59,101.94

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1.5x scale

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.