Home / 128,926.62-177,921.81-72,342.18

Finding the Fourth Proportional to 128,926.62, 177,921.81 and 72,342.18

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Solution

The fourth proportional to 128,926.62, 177,921.81 and 72,342.18 is: 99,833.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,926.62 : 177,921.81 = 72,342.18 : x
  2. Step 2: Convert to fraction form
    128,926.62/177,921.81 = 72,342.18/x
  3. Step 3: Cross multiply
    128,926.62x = 177,921.81 × 72,342.18
  4. Step 4: Simplify right side
    128,926.62x = 12,871,251,868.89
  5. Step 5: Solve for x
    x = 12,871,251,868.89/128,926.62
  6. Step 6: Final answer
    x = 99,833.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.