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Finding the Fourth Proportional to 83,478.55, 115,200.18 and 45,239.16

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Solution

The fourth proportional to 83,478.55, 115,200.18 and 45,239.16 is: 62,429.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,478.55 : 115,200.18 = 45,239.16 : x
  2. Step 2: Convert to fraction form
    83,478.55/115,200.18 = 45,239.16/x
  3. Step 3: Cross multiply
    83,478.55x = 115,200.18 × 45,239.16
  4. Step 4: Simplify right side
    83,478.55x = 5,211,559,375.05
  5. Step 5: Solve for x
    x = 5,211,559,375.05/83,478.55
  6. Step 6: Final answer
    x = 62,429.92

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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.