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Finding the Fourth Proportional to 122,639.52, 183,978.48 and 39,541.92

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Solution

The fourth proportional to 122,639.52, 183,978.48 and 39,541.92 is: 59,319.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,639.52 : 183,978.48 = 39,541.92 : x
  2. Step 2: Convert to fraction form
    122,639.52/183,978.48 = 39,541.92/x
  3. Step 3: Cross multiply
    122,639.52x = 183,978.48 × 39,541.92
  4. Step 4: Simplify right side
    122,639.52x = 7,274,862,337.88
  5. Step 5: Solve for x
    x = 7,274,862,337.88/122,639.52
  6. Step 6: Final answer
    x = 59,319.07

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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.