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Finding the Fourth Proportional to 129,754.16, 179,066.06 and 81,990.08

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Solution

The fourth proportional to 129,754.16, 179,066.06 and 81,990.08 is: 113,149.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,754.16 : 179,066.06 = 81,990.08 : x
  2. Step 2: Convert to fraction form
    129,754.16/179,066.06 = 81,990.08/x
  3. Step 3: Cross multiply
    129,754.16x = 179,066.06 × 81,990.08
  4. Step 4: Simplify right side
    129,754.16x = 14,681,639,279.40
  5. Step 5: Solve for x
    x = 14,681,639,279.40/129,754.16
  6. Step 6: Final answer
    x = 113,149.67

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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.