Home / 87,892.29-121,257.90-64,977.14

Finding the Fourth Proportional to 87,892.29, 121,257.90 and 64,977.14

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Solution

The fourth proportional to 87,892.29, 121,257.90 and 64,977.14 is: 89,643.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,892.29 : 121,257.90 = 64,977.14 : x
  2. Step 2: Convert to fraction form
    87,892.29/121,257.90 = 64,977.14/x
  3. Step 3: Cross multiply
    87,892.29x = 121,257.90 × 64,977.14
  4. Step 4: Simplify right side
    87,892.29x = 7,878,991,847.55
  5. Step 5: Solve for x
    x = 7,878,991,847.55/87,892.29
  6. Step 6: Final answer
    x = 89,643.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.