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Finding the Fourth Proportional to 124,043.79, 171,177.32 and 72,370.79

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Solution

The fourth proportional to 124,043.79, 171,177.32 and 72,370.79 is: 99,869.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,043.79 : 171,177.32 = 72,370.79 : x
  2. Step 2: Convert to fraction form
    124,043.79/171,177.32 = 72,370.79/x
  3. Step 3: Cross multiply
    124,043.79x = 171,177.32 × 72,370.79
  4. Step 4: Simplify right side
    124,043.79x = 12,388,237,203.52
  5. Step 5: Solve for x
    x = 12,388,237,203.52/124,043.79
  6. Step 6: Final answer
    x = 99,869.87

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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.