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Finding the Fourth Proportional to 87,320.64, 130,784.03 and 61,142.25

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Solution

The fourth proportional to 87,320.64, 130,784.03 and 61,142.25 is: 91,575.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,320.64 : 130,784.03 = 61,142.25 : x
  2. Step 2: Convert to fraction form
    87,320.64/130,784.03 = 61,142.25/x
  3. Step 3: Cross multiply
    87,320.64x = 130,784.03 × 61,142.25
  4. Step 4: Simplify right side
    87,320.64x = 7,996,429,858.27
  5. Step 5: Solve for x
    x = 7,996,429,858.27/87,320.64
  6. Step 6: Final answer
    x = 91,575.48

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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.