Home / 128,401.38-192,444.33-72,123.20

Finding the Fourth Proportional to 128,401.38, 192,444.33 and 72,123.20

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Solution

The fourth proportional to 128,401.38, 192,444.33 and 72,123.20 is: 108,096.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,401.38 : 192,444.33 = 72,123.20 : x
  2. Step 2: Convert to fraction form
    128,401.38/192,444.33 = 72,123.20/x
  3. Step 3: Cross multiply
    128,401.38x = 192,444.33 × 72,123.20
  4. Step 4: Simplify right side
    128,401.38x = 13,879,699,939.23
  5. Step 5: Solve for x
    x = 13,879,699,939.23/128,401.38
  6. Step 6: Final answer
    x = 108,096.19

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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.