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Finding the Fourth Proportional to 128,091.32, 176,742.72 and 89,967.35

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Solution

The fourth proportional to 128,091.32, 176,742.72 and 89,967.35 is: 124,138.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,091.32 : 176,742.72 = 89,967.35 : x
  2. Step 2: Convert to fraction form
    128,091.32/176,742.72 = 89,967.35/x
  3. Step 3: Cross multiply
    128,091.32x = 176,742.72 × 89,967.35
  4. Step 4: Simplify right side
    128,091.32x = 15,901,073,266.48
  5. Step 5: Solve for x
    x = 15,901,073,266.48/128,091.32
  6. Step 6: Final answer
    x = 124,138.57

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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.