Home / 77,302.20-115,953.30-72,079.80

Finding the Fourth Proportional to 77,302.20, 115,953.30 and 72,079.80

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Solution

The fourth proportional to 77,302.20, 115,953.30 and 72,079.80 is: 108,119.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,302.20 : 115,953.30 = 72,079.80 : x
  2. Step 2: Convert to fraction form
    77,302.20/115,953.30 = 72,079.80/x
  3. Step 3: Cross multiply
    77,302.20x = 115,953.30 × 72,079.80
  4. Step 4: Simplify right side
    77,302.20x = 8,357,890,673.34
  5. Step 5: Solve for x
    x = 8,357,890,673.34/77,302.20
  6. Step 6: Final answer
    x = 108,119.70

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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.