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Finding the Fourth Proportional to 124,702.72, 187,128.60 and 45,824.92

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Solution

The fourth proportional to 124,702.72, 187,128.60 and 45,824.92 is: 68,764.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,702.72 : 187,128.60 = 45,824.92 : x
  2. Step 2: Convert to fraction form
    124,702.72/187,128.60 = 45,824.92/x
  3. Step 3: Cross multiply
    124,702.72x = 187,128.60 × 45,824.92
  4. Step 4: Simplify right side
    124,702.72x = 8,575,153,124.71
  5. Step 5: Solve for x
    x = 8,575,153,124.71/124,702.72
  6. Step 6: Final answer
    x = 68,764.76

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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.