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Finding the Fourth Proportional to 78,808.46, 108,753.56 and 42,998.46

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Solution

The fourth proportional to 78,808.46, 108,753.56 and 42,998.46 is: 59,336.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,808.46 : 108,753.56 = 42,998.46 : x
  2. Step 2: Convert to fraction form
    78,808.46/108,753.56 = 42,998.46/x
  3. Step 3: Cross multiply
    78,808.46x = 108,753.56 × 42,998.46
  4. Step 4: Simplify right side
    78,808.46x = 4,676,235,599.52
  5. Step 5: Solve for x
    x = 4,676,235,599.52/78,808.46
  6. Step 6: Final answer
    x = 59,336.72

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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.