Home / 128,926.06-177,921.03-72,341.62

Finding the Fourth Proportional to 128,926.06, 177,921.03 and 72,341.62

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Solution

The fourth proportional to 128,926.06, 177,921.03 and 72,341.62 is: 99,833.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,926.06 : 177,921.03 = 72,341.62 : x
  2. Step 2: Convert to fraction form
    128,926.06/177,921.03 = 72,341.62/x
  3. Step 3: Cross multiply
    128,926.06x = 177,921.03 × 72,341.62
  4. Step 4: Simplify right side
    128,926.06x = 12,871,095,542.27
  5. Step 5: Solve for x
    x = 12,871,095,542.27/128,926.06
  6. Step 6: Final answer
    x = 99,833.16

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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.