Home / 87,999.10-131,998.65-21,438.70

Finding the Fourth Proportional to 87,999.10, 131,998.65 and 21,438.70

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Solution

The fourth proportional to 87,999.10, 131,998.65 and 21,438.70 is: 32,158.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,999.10 : 131,998.65 = 21,438.70 : x
  2. Step 2: Convert to fraction form
    87,999.10/131,998.65 = 21,438.70/x
  3. Step 3: Cross multiply
    87,999.10x = 131,998.65 × 21,438.70
  4. Step 4: Simplify right side
    87,999.10x = 2,829,879,457.76
  5. Step 5: Solve for x
    x = 2,829,879,457.76/87,999.10
  6. Step 6: Final answer
    x = 32,158.05

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1.5x scale

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.