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Finding the Fourth Proportional to 71,387.80, 107,081.70 and 64,826.80

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Solution

The fourth proportional to 71,387.80, 107,081.70 and 64,826.80 is: 97,240.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,387.80 : 107,081.70 = 64,826.80 : x
  2. Step 2: Convert to fraction form
    71,387.80/107,081.70 = 64,826.80/x
  3. Step 3: Cross multiply
    71,387.80x = 107,081.70 × 64,826.80
  4. Step 4: Simplify right side
    71,387.80x = 6,941,763,949.56
  5. Step 5: Solve for x
    x = 6,941,763,949.56/71,387.80
  6. Step 6: Final answer
    x = 97,240.20

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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.