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Finding the Fourth Proportional to 129,781, 179,123.70 and 73,193.32

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Solution

The fourth proportional to 129,781, 179,123.70 and 73,193.32 is: 101,021.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,781 : 179,123.70 = 73,193.32 : x
  2. Step 2: Convert to fraction form
    129,781/179,123.70 = 73,193.32/x
  3. Step 3: Cross multiply
    129,781x = 179,123.70 × 73,193.32
  4. Step 4: Simplify right side
    129,781x = 13,110,658,293.68
  5. Step 5: Solve for x
    x = 13,110,658,293.68/129,781
  6. Step 6: Final answer
    x = 101,021.40

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1.5x scale

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.