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Finding the Fourth Proportional to 120,840.30, 181,260.45 and 115,008.30

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Solution

The fourth proportional to 120,840.30, 181,260.45 and 115,008.30 is: 172,512.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,840.30 : 181,260.45 = 115,008.30 : x
  2. Step 2: Convert to fraction form
    120,840.30/181,260.45 = 115,008.30/x
  3. Step 3: Cross multiply
    120,840.30x = 181,260.45 × 115,008.30
  4. Step 4: Simplify right side
    120,840.30x = 20,846,456,211.74
  5. Step 5: Solve for x
    x = 20,846,456,211.74/120,840.30
  6. Step 6: Final answer
    x = 172,512.45

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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.