Home / 85,904.11-128,825.29-29,728.97

Finding the Fourth Proportional to 85,904.11, 128,825.29 and 29,728.97

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Solution

The fourth proportional to 85,904.11, 128,825.29 and 29,728.97 is: 44,582.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,904.11 : 128,825.29 = 29,728.97 : x
  2. Step 2: Convert to fraction form
    85,904.11/128,825.29 = 29,728.97/x
  3. Step 3: Cross multiply
    85,904.11x = 128,825.29 × 29,728.97
  4. Step 4: Simplify right side
    85,904.11x = 3,829,843,615.20
  5. Step 5: Solve for x
    x = 3,829,843,615.20/85,904.11
  6. Step 6: Final answer
    x = 44,582.77

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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.