Home / 78,306.57-117,458.82-19,142.76

Finding the Fourth Proportional to 78,306.57, 117,458.82 and 19,142.76

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Solution

The fourth proportional to 78,306.57, 117,458.82 and 19,142.76 is: 28,713.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,306.57 : 117,458.82 = 19,142.76 : x
  2. Step 2: Convert to fraction form
    78,306.57/117,458.82 = 19,142.76/x
  3. Step 3: Cross multiply
    78,306.57x = 117,458.82 × 19,142.76
  4. Step 4: Simplify right side
    78,306.57x = 2,248,486,001.14
  5. Step 5: Solve for x
    x = 2,248,486,001.14/78,306.57
  6. Step 6: Final answer
    x = 28,713.89

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1.5x scale

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.