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Finding the Fourth Proportional to 120,127.72, 165,780.92 and 79,771.92

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Solution

The fourth proportional to 120,127.72, 165,780.92 and 79,771.92 is: 110,088.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,127.72 : 165,780.92 = 79,771.92 : x
  2. Step 2: Convert to fraction form
    120,127.72/165,780.92 = 79,771.92/x
  3. Step 3: Cross multiply
    120,127.72x = 165,780.92 × 79,771.92
  4. Step 4: Simplify right side
    120,127.72x = 13,224,662,287.77
  5. Step 5: Solve for x
    x = 13,224,662,287.77/120,127.72
  6. Step 6: Final answer
    x = 110,088.35

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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.