Home / 87,811.29-131,719.10-28,653.21

Finding the Fourth Proportional to 87,811.29, 131,719.10 and 28,653.21

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Solution

The fourth proportional to 87,811.29, 131,719.10 and 28,653.21 is: 42,980.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,811.29 : 131,719.10 = 28,653.21 : x
  2. Step 2: Convert to fraction form
    87,811.29/131,719.10 = 28,653.21/x
  3. Step 3: Cross multiply
    87,811.29x = 131,719.10 × 28,653.21
  4. Step 4: Simplify right side
    87,811.29x = 3,774,174,890.04
  5. Step 5: Solve for x
    x = 3,774,174,890.04/87,811.29
  6. Step 6: Final answer
    x = 42,980.52

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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.