Home / 81,070.62-121,621.75-31,146.88

Finding the Fourth Proportional to 81,070.62, 121,621.75 and 31,146.88

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Solution

The fourth proportional to 81,070.62, 121,621.75 and 31,146.88 is: 46,726.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,070.62 : 121,621.75 = 31,146.88 : x
  2. Step 2: Convert to fraction form
    81,070.62/121,621.75 = 31,146.88/x
  3. Step 3: Cross multiply
    81,070.62x = 121,621.75 × 31,146.88
  4. Step 4: Simplify right side
    81,070.62x = 3,788,138,073.96
  5. Step 5: Solve for x
    x = 3,788,138,073.96/81,070.62
  6. Step 6: Final answer
    x = 46,726.40

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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.