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Finding the Fourth Proportional to 79,658.40, 119,487.60 and 76,159.20

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Solution

The fourth proportional to 79,658.40, 119,487.60 and 76,159.20 is: 114,238.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,658.40 : 119,487.60 = 76,159.20 : x
  2. Step 2: Convert to fraction form
    79,658.40/119,487.60 = 76,159.20/x
  3. Step 3: Cross multiply
    79,658.40x = 119,487.60 × 76,159.20
  4. Step 4: Simplify right side
    79,658.40x = 9,100,080,025.92
  5. Step 5: Solve for x
    x = 9,100,080,025.92/79,658.40
  6. Step 6: Final answer
    x = 114,238.80

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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.