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Finding the Fourth Proportional to 124,138.86, 171,281.76 and 73,153.68

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Solution

The fourth proportional to 124,138.86, 171,281.76 and 73,153.68 is: 100,934.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,138.86 : 171,281.76 = 73,153.68 : x
  2. Step 2: Convert to fraction form
    124,138.86/171,281.76 = 73,153.68/x
  3. Step 3: Cross multiply
    124,138.86x = 171,281.76 × 73,153.68
  4. Step 4: Simplify right side
    124,138.86x = 12,529,891,060.88
  5. Step 5: Solve for x
    x = 12,529,891,060.88/124,138.86
  6. Step 6: Final answer
    x = 100,934.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.