Home / 128,926.75-177,921.98-72,342.31

Finding the Fourth Proportional to 128,926.75, 177,921.98 and 72,342.31

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Solution

The fourth proportional to 128,926.75, 177,921.98 and 72,342.31 is: 99,834.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,926.75 : 177,921.98 = 72,342.31 : x
  2. Step 2: Convert to fraction form
    128,926.75/177,921.98 = 72,342.31/x
  3. Step 3: Cross multiply
    128,926.75x = 177,921.98 × 72,342.31
  4. Step 4: Simplify right side
    128,926.75x = 12,871,286,588.17
  5. Step 5: Solve for x
    x = 12,871,286,588.17/128,926.75
  6. Step 6: Final answer
    x = 99,834.11

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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.