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Finding the Fourth Proportional to 78,997.91, 118,496.88 and 26,407.40

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Solution

The fourth proportional to 78,997.91, 118,496.88 and 26,407.40 is: 39,611.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,997.91 : 118,496.88 = 26,407.40 : x
  2. Step 2: Convert to fraction form
    78,997.91/118,496.88 = 26,407.40/x
  3. Step 3: Cross multiply
    78,997.91x = 118,496.88 × 26,407.40
  4. Step 4: Simplify right side
    78,997.91x = 3,129,194,508.91
  5. Step 5: Solve for x
    x = 3,129,194,508.91/78,997.91
  6. Step 6: Final answer
    x = 39,611.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.