Home / 121,215.20-181,822.80-54,730.40

Finding the Fourth Proportional to 121,215.20, 181,822.80 and 54,730.40

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Solution

The fourth proportional to 121,215.20, 181,822.80 and 54,730.40 is: 82,095.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,215.20 : 181,822.80 = 54,730.40 : x
  2. Step 2: Convert to fraction form
    121,215.20/181,822.80 = 54,730.40/x
  3. Step 3: Cross multiply
    121,215.20x = 181,822.80 × 54,730.40
  4. Step 4: Simplify right side
    121,215.20x = 9,951,234,573.12
  5. Step 5: Solve for x
    x = 9,951,234,573.12/121,215.20
  6. Step 6: Final answer
    x = 82,095.60

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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.