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Finding the Fourth Proportional to 87,987.84, 131,803.02 and 70,248.48

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Solution

The fourth proportional to 87,987.84, 131,803.02 and 70,248.48 is: 105,230.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,987.84 : 131,803.02 = 70,248.48 : x
  2. Step 2: Convert to fraction form
    87,987.84/131,803.02 = 70,248.48/x
  3. Step 3: Cross multiply
    87,987.84x = 131,803.02 × 70,248.48
  4. Step 4: Simplify right side
    87,987.84x = 9,258,961,814.41
  5. Step 5: Solve for x
    x = 9,258,961,814.41/87,987.84
  6. Step 6: Final answer
    x = 105,230.02

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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.