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Finding the Fourth Proportional to 129,700.80, 178,987.10 and 70,084.80

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Solution

The fourth proportional to 129,700.80, 178,987.10 and 70,084.80 is: 96,717.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,700.80 : 178,987.10 = 70,084.80 : x
  2. Step 2: Convert to fraction form
    129,700.80/178,987.10 = 70,084.80/x
  3. Step 3: Cross multiply
    129,700.80x = 178,987.10 × 70,084.80
  4. Step 4: Simplify right side
    129,700.80x = 12,544,274,755.66
  5. Step 5: Solve for x
    x = 12,544,274,755.66/129,700.80
  6. Step 6: Final answer
    x = 96,717.02

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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.