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Finding the Fourth Proportional to 87,173.76, 130,765.20 and 28,004.76

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Solution

The fourth proportional to 87,173.76, 130,765.20 and 28,004.76 is: 42,008.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,173.76 : 130,765.20 = 28,004.76 : x
  2. Step 2: Convert to fraction form
    87,173.76/130,765.20 = 28,004.76/x
  3. Step 3: Cross multiply
    87,173.76x = 130,765.20 × 28,004.76
  4. Step 4: Simplify right side
    87,173.76x = 3,662,048,042.35
  5. Step 5: Solve for x
    x = 3,662,048,042.35/87,173.76
  6. Step 6: Final answer
    x = 42,008.60

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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.