Home / 129,621.51-178,724.67-88,805.21

Finding the Fourth Proportional to 129,621.51, 178,724.67 and 88,805.21

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Solution

The fourth proportional to 129,621.51, 178,724.67 and 88,805.21 is: 122,446.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,621.51 : 178,724.67 = 88,805.21 : x
  2. Step 2: Convert to fraction form
    129,621.51/178,724.67 = 88,805.21/x
  3. Step 3: Cross multiply
    129,621.51x = 178,724.67 × 88,805.21
  4. Step 4: Simplify right side
    129,621.51x = 15,871,680,957.91
  5. Step 5: Solve for x
    x = 15,871,680,957.91/129,621.51
  6. Step 6: Final answer
    x = 122,446.35

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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.