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Finding the Fourth Proportional to 83,679.95, 115,479.72 and 45,439.57

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Solution

The fourth proportional to 83,679.95, 115,479.72 and 45,439.57 is: 62,707.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,679.95 : 115,479.72 = 45,439.57 : x
  2. Step 2: Convert to fraction form
    83,679.95/115,479.72 = 45,439.57/x
  3. Step 3: Cross multiply
    83,679.95x = 115,479.72 × 45,439.57
  4. Step 4: Simplify right side
    83,679.95x = 5,247,348,593.32
  5. Step 5: Solve for x
    x = 5,247,348,593.32/83,679.95
  6. Step 6: Final answer
    x = 62,707.36

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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.