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Finding the Fourth Proportional to 78,446.55, 108,257.34 and 42,636.55

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Solution

The fourth proportional to 78,446.55, 108,257.34 and 42,636.55 is: 58,839.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,446.55 : 108,257.34 = 42,636.55 : x
  2. Step 2: Convert to fraction form
    78,446.55/108,257.34 = 42,636.55/x
  3. Step 3: Cross multiply
    78,446.55x = 108,257.34 × 42,636.55
  4. Step 4: Simplify right side
    78,446.55x = 4,615,719,526.73
  5. Step 5: Solve for x
    x = 4,615,719,526.73/78,446.55
  6. Step 6: Final answer
    x = 58,839.04

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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.