Home / 87,878.79-131,817.02-21,319.47

Finding the Fourth Proportional to 87,878.79, 131,817.02 and 21,319.47

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Solution

The fourth proportional to 87,878.79, 131,817.02 and 21,319.47 is: 31,978.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,878.79 : 131,817.02 = 21,319.47 : x
  2. Step 2: Convert to fraction form
    87,878.79/131,817.02 = 21,319.47/x
  3. Step 3: Cross multiply
    87,878.79x = 131,817.02 × 21,319.47
  4. Step 4: Simplify right side
    87,878.79x = 2,810,268,896.78
  5. Step 5: Solve for x
    x = 2,810,268,896.78/87,878.79
  6. Step 6: Final answer
    x = 31,978.92

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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.