Home / 85,799.42-128,608.38-31,729.35

Finding the Fourth Proportional to 85,799.42, 128,608.38 and 31,729.35

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Solution

The fourth proportional to 85,799.42, 128,608.38 and 31,729.35 is: 47,560.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,799.42 : 128,608.38 = 31,729.35 : x
  2. Step 2: Convert to fraction form
    85,799.42/128,608.38 = 31,729.35/x
  3. Step 3: Cross multiply
    85,799.42x = 128,608.38 × 31,729.35
  4. Step 4: Simplify right side
    85,799.42x = 4,080,660,301.95
  5. Step 5: Solve for x
    x = 4,080,660,301.95/85,799.42
  6. Step 6: Final answer
    x = 47,560.47

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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.