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Finding the Fourth Proportional to 125,312.28, 187,906.21 and 39,912

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Solution

The fourth proportional to 125,312.28, 187,906.21 and 39,912 is: 59,848.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,312.28 : 187,906.21 = 39,912 : x
  2. Step 2: Convert to fraction form
    125,312.28/187,906.21 = 39,912/x
  3. Step 3: Cross multiply
    125,312.28x = 187,906.21 × 39,912
  4. Step 4: Simplify right side
    125,312.28x = 7,499,712,653.52
  5. Step 5: Solve for x
    x = 7,499,712,653.52/125,312.28
  6. Step 6: Final answer
    x = 59,848.19

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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.