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Finding the Fourth Proportional to 85,995.18, 128,959.56 and 33,397.56

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Solution

The fourth proportional to 85,995.18, 128,959.56 and 33,397.56 is: 50,083.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,995.18 : 128,959.56 = 33,397.56 : x
  2. Step 2: Convert to fraction form
    85,995.18/128,959.56 = 33,397.56/x
  3. Step 3: Cross multiply
    85,995.18x = 128,959.56 × 33,397.56
  4. Step 4: Simplify right side
    85,995.18x = 4,306,934,642.67
  5. Step 5: Solve for x
    x = 4,306,934,642.67/85,995.18
  6. Step 6: Final answer
    x = 50,083.44

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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.