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Finding the Fourth Proportional to 129,604.60, 178,864.98 and 73,019.80

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Solution

The fourth proportional to 129,604.60, 178,864.98 and 73,019.80 is: 100,773.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,604.60 : 178,864.98 = 73,019.80 : x
  2. Step 2: Convert to fraction form
    129,604.60/178,864.98 = 73,019.80/x
  3. Step 3: Cross multiply
    129,604.60x = 178,864.98 × 73,019.80
  4. Step 4: Simplify right side
    129,604.60x = 13,060,685,066.60
  5. Step 5: Solve for x
    x = 13,060,685,066.60/129,604.60
  6. Step 6: Final answer
    x = 100,773.31

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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.