Home / 87,345.72-130,986.35-31,170.81

Finding the Fourth Proportional to 87,345.72, 130,986.35 and 31,170.81

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Solution

The fourth proportional to 87,345.72, 130,986.35 and 31,170.81 is: 46,744.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,345.72 : 130,986.35 = 31,170.81 : x
  2. Step 2: Convert to fraction form
    87,345.72/130,986.35 = 31,170.81/x
  3. Step 3: Cross multiply
    87,345.72x = 130,986.35 × 31,170.81
  4. Step 4: Simplify right side
    87,345.72x = 4,082,949,817.66
  5. Step 5: Solve for x
    x = 4,082,949,817.66/87,345.72
  6. Step 6: Final answer
    x = 46,744.70

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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.