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Finding the Fourth Proportional to 71,007.44, 97,989.70 and 39,177.68

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Solution

The fourth proportional to 71,007.44, 97,989.70 and 39,177.68 is: 54,064.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,007.44 : 97,989.70 = 39,177.68 : x
  2. Step 2: Convert to fraction form
    71,007.44/97,989.70 = 39,177.68/x
  3. Step 3: Cross multiply
    71,007.44x = 97,989.70 × 39,177.68
  4. Step 4: Simplify right side
    71,007.44x = 3,839,009,109.90
  5. Step 5: Solve for x
    x = 3,839,009,109.90/71,007.44
  6. Step 6: Final answer
    x = 54,064.89

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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.