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Finding the Fourth Proportional to 87,156.37, 130,691.37 and 30,988.06

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Solution

The fourth proportional to 87,156.37, 130,691.37 and 30,988.06 is: 46,466.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,156.37 : 130,691.37 = 30,988.06 : x
  2. Step 2: Convert to fraction form
    87,156.37/130,691.37 = 30,988.06/x
  3. Step 3: Cross multiply
    87,156.37x = 130,691.37 × 30,988.06
  4. Step 4: Simplify right side
    87,156.37x = 4,049,872,015.04
  5. Step 5: Solve for x
    x = 4,049,872,015.04/87,156.37
  6. Step 6: Final answer
    x = 46,466.74

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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.