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Finding the Fourth Proportional to 80,447.64, 111,066.64 and 62,508.80

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Solution

The fourth proportional to 80,447.64, 111,066.64 and 62,508.80 is: 86,300.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,447.64 : 111,066.64 = 62,508.80 : x
  2. Step 2: Convert to fraction form
    80,447.64/111,066.64 = 62,508.80/x
  3. Step 3: Cross multiply
    80,447.64x = 111,066.64 × 62,508.80
  4. Step 4: Simplify right side
    80,447.64x = 6,942,642,386.43
  5. Step 5: Solve for x
    x = 6,942,642,386.43/80,447.64
  6. Step 6: Final answer
    x = 86,300.14

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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.