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Finding the Fourth Proportional to 110,658.40, 165,728.40 and 75,407.20

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Solution

The fourth proportional to 110,658.40, 165,728.40 and 75,407.20 is: 112,934.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,658.40 : 165,728.40 = 75,407.20 : x
  2. Step 2: Convert to fraction form
    110,658.40/165,728.40 = 75,407.20/x
  3. Step 3: Cross multiply
    110,658.40x = 165,728.40 × 75,407.20
  4. Step 4: Simplify right side
    110,658.40x = 12,497,114,604.48
  5. Step 5: Solve for x
    x = 12,497,114,604.48/110,658.40
  6. Step 6: Final answer
    x = 112,934.17

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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.