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Finding the Fourth Proportional to 129,816.78, 179,147.10 and 70,200.78

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Solution

The fourth proportional to 129,816.78, 179,147.10 and 70,200.78 is: 96,877.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,816.78 : 179,147.10 = 70,200.78 : x
  2. Step 2: Convert to fraction form
    129,816.78/179,147.10 = 70,200.78/x
  3. Step 3: Cross multiply
    129,816.78x = 179,147.10 × 70,200.78
  4. Step 4: Simplify right side
    129,816.78x = 12,576,266,154.74
  5. Step 5: Solve for x
    x = 12,576,266,154.74/129,816.78
  6. Step 6: Final answer
    x = 96,877.05

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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.