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Finding the Fourth Proportional to 87,248.51, 130,899.03 and 31,081.28

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Solution

The fourth proportional to 87,248.51, 130,899.03 and 31,081.28 is: 46,631.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,248.51 : 130,899.03 = 31,081.28 : x
  2. Step 2: Convert to fraction form
    87,248.51/130,899.03 = 31,081.28/x
  3. Step 3: Cross multiply
    87,248.51x = 130,899.03 × 31,081.28
  4. Step 4: Simplify right side
    87,248.51x = 4,068,509,247.75
  5. Step 5: Solve for x
    x = 4,068,509,247.75/87,248.51
  6. Step 6: Final answer
    x = 46,631.28

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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.