Home / 128,237.28-192,394.80-90,869.76

Finding the Fourth Proportional to 128,237.28, 192,394.80 and 90,869.76

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Solution

The fourth proportional to 128,237.28, 192,394.80 and 90,869.76 is: 136,332.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,237.28 : 192,394.80 = 90,869.76 : x
  2. Step 2: Convert to fraction form
    128,237.28/192,394.80 = 90,869.76/x
  3. Step 3: Cross multiply
    128,237.28x = 192,394.80 × 90,869.76
  4. Step 4: Simplify right side
    128,237.28x = 17,482,869,301.25
  5. Step 5: Solve for x
    x = 17,482,869,301.25/128,237.28
  6. Step 6: Final answer
    x = 136,332.19

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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.