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Finding the Fourth Proportional to 78,445.87, 108,254.68 and 42,634.96

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Solution

The fourth proportional to 78,445.87, 108,254.68 and 42,634.96 is: 58,835.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,445.87 : 108,254.68 = 42,634.96 : x
  2. Step 2: Convert to fraction form
    78,445.87/108,254.68 = 42,634.96/x
  3. Step 3: Cross multiply
    78,445.87x = 108,254.68 × 42,634.96
  4. Step 4: Simplify right side
    78,445.87x = 4,615,433,574.39
  5. Step 5: Solve for x
    x = 4,615,433,574.39/78,445.87
  6. Step 6: Final answer
    x = 58,835.90

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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.