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Finding the Fourth Proportional to 71,005.08, 97,987 and 39,174.04

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Solution

The fourth proportional to 71,005.08, 97,987 and 39,174.04 is: 54,060.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,005.08 : 97,987 = 39,174.04 : x
  2. Step 2: Convert to fraction form
    71,005.08/97,987 = 39,174.04/x
  3. Step 3: Cross multiply
    71,005.08x = 97,987 × 39,174.04
  4. Step 4: Simplify right side
    71,005.08x = 3,838,546,657.48
  5. Step 5: Solve for x
    x = 3,838,546,657.48/71,005.08
  6. Step 6: Final answer
    x = 54,060.17

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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.