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Finding the Fourth Proportional to 87,000.40, 130,524.90 and 42,628.60

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Solution

The fourth proportional to 87,000.40, 130,524.90 and 42,628.60 is: 63,954.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,000.40 : 130,524.90 = 42,628.60 : x
  2. Step 2: Convert to fraction form
    87,000.40/130,524.90 = 42,628.60/x
  3. Step 3: Cross multiply
    87,000.40x = 130,524.90 × 42,628.60
  4. Step 4: Simplify right side
    87,000.40x = 5,564,093,752.14
  5. Step 5: Solve for x
    x = 5,564,093,752.14/87,000.40
  6. Step 6: Final answer
    x = 63,954.81

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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.