Home / 78,286.10-108,031.12-42,475.79

Finding the Fourth Proportional to 78,286.10, 108,031.12 and 42,475.79

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Solution

The fourth proportional to 78,286.10, 108,031.12 and 42,475.79 is: 58,614.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,286.10 : 108,031.12 = 42,475.79 : x
  2. Step 2: Convert to fraction form
    78,286.10/108,031.12 = 42,475.79/x
  3. Step 3: Cross multiply
    78,286.10x = 108,031.12 × 42,475.79
  4. Step 4: Simplify right side
    78,286.10x = 4,588,707,330.47
  5. Step 5: Solve for x
    x = 4,588,707,330.47/78,286.10
  6. Step 6: Final answer
    x = 58,614.59

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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.