Home / 121,145.40-181,718.10-76,822.20

Finding the Fourth Proportional to 121,145.40, 181,718.10 and 76,822.20

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Solution

The fourth proportional to 121,145.40, 181,718.10 and 76,822.20 is: 115,233.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,145.40 : 181,718.10 = 76,822.20 : x
  2. Step 2: Convert to fraction form
    121,145.40/181,718.10 = 76,822.20/x
  3. Step 3: Cross multiply
    121,145.40x = 181,718.10 × 76,822.20
  4. Step 4: Simplify right side
    121,145.40x = 13,959,984,221.82
  5. Step 5: Solve for x
    x = 13,959,984,221.82/121,145.40
  6. Step 6: Final answer
    x = 115,233.30

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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.