Home / 128,431.18-192,685.56-38,476.81

Finding the Fourth Proportional to 128,431.18, 192,685.56 and 38,476.81

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Solution

The fourth proportional to 128,431.18, 192,685.56 and 38,476.81 is: 57,726.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,431.18 : 192,685.56 = 38,476.81 : x
  2. Step 2: Convert to fraction form
    128,431.18/192,685.56 = 38,476.81/x
  3. Step 3: Cross multiply
    128,431.18x = 192,685.56 × 38,476.81
  4. Step 4: Simplify right side
    128,431.18x = 7,413,925,681.86
  5. Step 5: Solve for x
    x = 7,413,925,681.86/128,431.18
  6. Step 6: Final answer
    x = 57,726.84

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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.