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Finding the Fourth Proportional to 71,788.89, 99,042.09 and 71,678.17

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Solution

The fourth proportional to 71,788.89, 99,042.09 and 71,678.17 is: 98,889.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,788.89 : 99,042.09 = 71,678.17 : x
  2. Step 2: Convert to fraction form
    71,788.89/99,042.09 = 71,678.17/x
  3. Step 3: Cross multiply
    71,788.89x = 99,042.09 × 71,678.17
  4. Step 4: Simplify right side
    71,788.89x = 7,099,155,764.18
  5. Step 5: Solve for x
    x = 7,099,155,764.18/71,788.89
  6. Step 6: Final answer
    x = 98,889.34

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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.