Home / 87,980.07-131,970.36-21,420.15

Finding the Fourth Proportional to 87,980.07, 131,970.36 and 21,420.15

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Solution

The fourth proportional to 87,980.07, 131,970.36 and 21,420.15 is: 32,130.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,980.07 : 131,970.36 = 21,420.15 : x
  2. Step 2: Convert to fraction form
    87,980.07/131,970.36 = 21,420.15/x
  3. Step 3: Cross multiply
    87,980.07x = 131,970.36 × 21,420.15
  4. Step 4: Simplify right side
    87,980.07x = 2,826,824,492.19
  5. Step 5: Solve for x
    x = 2,826,824,492.19/87,980.07
  6. Step 6: Final answer
    x = 32,130.28

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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.