Home / 87,211.50-130,836.75-31,807.50

Finding the Fourth Proportional to 87,211.50, 130,836.75 and 31,807.50

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Solution

The fourth proportional to 87,211.50, 130,836.75 and 31,807.50 is: 47,718.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,211.50 : 130,836.75 = 31,807.50 : x
  2. Step 2: Convert to fraction form
    87,211.50/130,836.75 = 31,807.50/x
  3. Step 3: Cross multiply
    87,211.50x = 130,836.75 × 31,807.50
  4. Step 4: Simplify right side
    87,211.50x = 4,161,589,925.63
  5. Step 5: Solve for x
    x = 4,161,589,925.63/87,211.50
  6. Step 6: Final answer
    x = 47,718.36

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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.