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Finding the Fourth Proportional to 102,331.80, 153,843.30 and 87,125.40

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Solution

The fourth proportional to 102,331.80, 153,843.30 and 87,125.40 is: 130,982.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,331.80 : 153,843.30 = 87,125.40 : x
  2. Step 2: Convert to fraction form
    102,331.80/153,843.30 = 87,125.40/x
  3. Step 3: Cross multiply
    102,331.80x = 153,843.30 × 87,125.40
  4. Step 4: Simplify right side
    102,331.80x = 13,403,659,049.82
  5. Step 5: Solve for x
    x = 13,403,659,049.82/102,331.80
  6. Step 6: Final answer
    x = 130,982.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.