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Finding the Fourth Proportional to 71,001.87, 105,921.35 and 69,071.39

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Solution

The fourth proportional to 71,001.87, 105,921.35 and 69,071.39 is: 103,041.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,001.87 : 105,921.35 = 69,071.39 : x
  2. Step 2: Convert to fraction form
    71,001.87/105,921.35 = 69,071.39/x
  3. Step 3: Cross multiply
    71,001.87x = 105,921.35 × 69,071.39
  4. Step 4: Simplify right side
    71,001.87x = 7,316,134,086.55
  5. Step 5: Solve for x
    x = 7,316,134,086.55/71,001.87
  6. Step 6: Final answer
    x = 103,041.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.