Home / 128,934.18-193,401-72,748.80

Finding the Fourth Proportional to 128,934.18, 193,401 and 72,748.80

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Solution

The fourth proportional to 128,934.18, 193,401 and 72,748.80 is: 109,123.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,934.18 : 193,401 = 72,748.80 : x
  2. Step 2: Convert to fraction form
    128,934.18/193,401 = 72,748.80/x
  3. Step 3: Cross multiply
    128,934.18x = 193,401 × 72,748.80
  4. Step 4: Simplify right side
    128,934.18x = 14,069,690,668.80
  5. Step 5: Solve for x
    x = 14,069,690,668.80/128,934.18
  6. Step 6: Final answer
    x = 109,123.05

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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.