Home / 142,587.11-213,921.05-71,423.79

Finding the Fourth Proportional to 142,587.11, 213,921.05 and 71,423.79

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Solution

The fourth proportional to 142,587.11, 213,921.05 and 71,423.79 is: 107,155.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,587.11 : 213,921.05 = 71,423.79 : x
  2. Step 2: Convert to fraction form
    142,587.11/213,921.05 = 71,423.79/x
  3. Step 3: Cross multiply
    142,587.11x = 213,921.05 × 71,423.79
  4. Step 4: Simplify right side
    142,587.11x = 15,279,051,794.66
  5. Step 5: Solve for x
    x = 15,279,051,794.66/142,587.11
  6. Step 6: Final answer
    x = 107,155.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.