Home / 87,980.12-131,970.44-21,420.24

Finding the Fourth Proportional to 87,980.12, 131,970.44 and 21,420.24

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Solution

The fourth proportional to 87,980.12, 131,970.44 and 21,420.24 is: 32,130.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,980.12 : 131,970.44 = 21,420.24 : x
  2. Step 2: Convert to fraction form
    87,980.12/131,970.44 = 21,420.24/x
  3. Step 3: Cross multiply
    87,980.12x = 131,970.44 × 21,420.24
  4. Step 4: Simplify right side
    87,980.12x = 2,826,838,497.71
  5. Step 5: Solve for x
    x = 2,826,838,497.71/87,980.12
  6. Step 6: Final answer
    x = 32,130.42

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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.