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Finding the Fourth Proportional to 129,653.50, 178,921.84 and 73,066.90

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Solution

The fourth proportional to 129,653.50, 178,921.84 and 73,066.90 is: 100,832.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,653.50 : 178,921.84 = 73,066.90 : x
  2. Step 2: Convert to fraction form
    129,653.50/178,921.84 = 73,066.90/x
  3. Step 3: Cross multiply
    129,653.50x = 178,921.84 × 73,066.90
  4. Step 4: Simplify right side
    129,653.50x = 13,073,264,191.10
  5. Step 5: Solve for x
    x = 13,073,264,191.10/129,653.50
  6. Step 6: Final answer
    x = 100,832.33

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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.