Home / 81,989.10-122,983.65-52,440.30

Finding the Fourth Proportional to 81,989.10, 122,983.65 and 52,440.30

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Solution

The fourth proportional to 81,989.10, 122,983.65 and 52,440.30 is: 78,660.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,989.10 : 122,983.65 = 52,440.30 : x
  2. Step 2: Convert to fraction form
    81,989.10/122,983.65 = 52,440.30/x
  3. Step 3: Cross multiply
    81,989.10x = 122,983.65 × 52,440.30
  4. Step 4: Simplify right side
    81,989.10x = 6,449,299,501.10
  5. Step 5: Solve for x
    x = 6,449,299,501.10/81,989.10
  6. Step 6: Final answer
    x = 78,660.45

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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.