Home / 81,031.23-121,546.85-21,866.90

Finding the Fourth Proportional to 81,031.23, 121,546.85 and 21,866.90

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Solution

The fourth proportional to 81,031.23, 121,546.85 and 21,866.90 is: 32,800.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,031.23 : 121,546.85 = 21,866.90 : x
  2. Step 2: Convert to fraction form
    81,031.23/121,546.85 = 21,866.90/x
  3. Step 3: Cross multiply
    81,031.23x = 121,546.85 × 21,866.90
  4. Step 4: Simplify right side
    81,031.23x = 2,657,852,097.20
  5. Step 5: Solve for x
    x = 2,657,852,097.20/81,031.23
  6. Step 6: Final answer
    x = 32,800.34

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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.