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Finding the Fourth Proportional to 71,005.68, 97,987.64 and 39,174.30

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Solution

The fourth proportional to 71,005.68, 97,987.64 and 39,174.30 is: 54,060.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,005.68 : 97,987.64 = 39,174.30 : x
  2. Step 2: Convert to fraction form
    71,005.68/97,987.64 = 39,174.30/x
  3. Step 3: Cross multiply
    71,005.68x = 97,987.64 × 39,174.30
  4. Step 4: Simplify right side
    71,005.68x = 3,838,597,009.78
  5. Step 5: Solve for x
    x = 3,838,597,009.78/71,005.68
  6. Step 6: Final answer
    x = 54,060.42

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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.