Home / 78,419.13-108,218.90-42,609.13

Finding the Fourth Proportional to 78,419.13, 108,218.90 and 42,609.13

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Solution

The fourth proportional to 78,419.13, 108,218.90 and 42,609.13 is: 58,800.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,419.13 : 108,218.90 = 42,609.13 : x
  2. Step 2: Convert to fraction form
    78,419.13/108,218.90 = 42,609.13/x
  3. Step 3: Cross multiply
    78,419.13x = 108,218.90 × 42,609.13
  4. Step 4: Simplify right side
    78,419.13x = 4,611,113,178.56
  5. Step 5: Solve for x
    x = 4,611,113,178.56/78,419.13
  6. Step 6: Final answer
    x = 58,800.87

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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.