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Finding the Fourth Proportional to 77,644.91, 107,217.20 and 73,659.08

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Solution

The fourth proportional to 77,644.91, 107,217.20 and 73,659.08 is: 101,713.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,644.91 : 107,217.20 = 73,659.08 : x
  2. Step 2: Convert to fraction form
    77,644.91/107,217.20 = 73,659.08/x
  3. Step 3: Cross multiply
    77,644.91x = 107,217.20 × 73,659.08
  4. Step 4: Simplify right side
    77,644.91x = 7,897,520,312.18
  5. Step 5: Solve for x
    x = 7,897,520,312.18/77,644.91
  6. Step 6: Final answer
    x = 101,713.30

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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.