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Finding the Fourth Proportional to 85,808.32, 128,718.08 and 33,218.24

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Solution

The fourth proportional to 85,808.32, 128,718.08 and 33,218.24 is: 49,829.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,808.32 : 128,718.08 = 33,218.24 : x
  2. Step 2: Convert to fraction form
    85,808.32/128,718.08 = 33,218.24/x
  3. Step 3: Cross multiply
    85,808.32x = 128,718.08 × 33,218.24
  4. Step 4: Simplify right side
    85,808.32x = 4,275,788,073.78
  5. Step 5: Solve for x
    x = 4,275,788,073.78/85,808.32
  6. Step 6: Final answer
    x = 49,829.53

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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.