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Finding the Fourth Proportional to 127,620, 176,115.60 and 71,031.42

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Solution

The fourth proportional to 127,620, 176,115.60 and 71,031.42 is: 98,023.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,620 : 176,115.60 = 71,031.42 : x
  2. Step 2: Convert to fraction form
    127,620/176,115.60 = 71,031.42/x
  3. Step 3: Cross multiply
    127,620x = 176,115.60 × 71,031.42
  4. Step 4: Simplify right side
    127,620x = 12,509,741,152.15
  5. Step 5: Solve for x
    x = 12,509,741,152.15/127,620
  6. Step 6: Final answer
    x = 98,023.36

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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.