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Finding the Fourth Proportional to 78,808.38, 108,754.08 and 42,997.50

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Solution

The fourth proportional to 78,808.38, 108,754.08 and 42,997.50 is: 59,335.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,808.38 : 108,754.08 = 42,997.50 : x
  2. Step 2: Convert to fraction form
    78,808.38/108,754.08 = 42,997.50/x
  3. Step 3: Cross multiply
    78,808.38x = 108,754.08 × 42,997.50
  4. Step 4: Simplify right side
    78,808.38x = 4,676,153,554.80
  5. Step 5: Solve for x
    x = 4,676,153,554.80/78,808.38
  6. Step 6: Final answer
    x = 59,335.74

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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.