Home / 128,724.84-177,650.75-71,382.13

Finding the Fourth Proportional to 128,724.84, 177,650.75 and 71,382.13

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Solution

The fourth proportional to 128,724.84, 177,650.75 and 71,382.13 is: 98,513.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,724.84 : 177,650.75 = 71,382.13 : x
  2. Step 2: Convert to fraction form
    128,724.84/177,650.75 = 71,382.13/x
  3. Step 3: Cross multiply
    128,724.84x = 177,650.75 × 71,382.13
  4. Step 4: Simplify right side
    128,724.84x = 12,681,088,931.10
  5. Step 5: Solve for x
    x = 12,681,088,931.10/128,724.84
  6. Step 6: Final answer
    x = 98,513.15

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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.