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Finding the Fourth Proportional to 87,243.40, 130,865.10 and 69,747.40

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Solution

The fourth proportional to 87,243.40, 130,865.10 and 69,747.40 is: 104,621.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,243.40 : 130,865.10 = 69,747.40 : x
  2. Step 2: Convert to fraction form
    87,243.40/130,865.10 = 69,747.40/x
  3. Step 3: Cross multiply
    87,243.40x = 130,865.10 × 69,747.40
  4. Step 4: Simplify right side
    87,243.40x = 9,127,500,475.74
  5. Step 5: Solve for x
    x = 9,127,500,475.74/87,243.40
  6. Step 6: Final answer
    x = 104,621.10

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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.