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Finding the Fourth Proportional to 102,691.95, 141,895.98 and 79,023.14

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Solution

The fourth proportional to 102,691.95, 141,895.98 and 79,023.14 is: 109,191.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,691.95 : 141,895.98 = 79,023.14 : x
  2. Step 2: Convert to fraction form
    102,691.95/141,895.98 = 79,023.14/x
  3. Step 3: Cross multiply
    102,691.95x = 141,895.98 × 79,023.14
  4. Step 4: Simplify right side
    102,691.95x = 11,213,066,291.52
  5. Step 5: Solve for x
    x = 11,213,066,291.52/102,691.95
  6. Step 6: Final answer
    x = 109,191.29

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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.