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Finding the Fourth Proportional to 71,191.86, 98,239.89 and 39,360.46

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Solution

The fourth proportional to 71,191.86, 98,239.89 and 39,360.46 is: 54,314.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,191.86 : 98,239.89 = 39,360.46 : x
  2. Step 2: Convert to fraction form
    71,191.86/98,239.89 = 39,360.46/x
  3. Step 3: Cross multiply
    71,191.86x = 98,239.89 × 39,360.46
  4. Step 4: Simplify right side
    71,191.86x = 3,866,767,260.75
  5. Step 5: Solve for x
    x = 3,866,767,260.75/71,191.86
  6. Step 6: Final answer
    x = 54,314.74

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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.