Home / 85,747.28-128,633.38-26,587.71

Finding the Fourth Proportional to 85,747.28, 128,633.38 and 26,587.71

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Solution

The fourth proportional to 85,747.28, 128,633.38 and 26,587.71 is: 39,885.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,747.28 : 128,633.38 = 26,587.71 : x
  2. Step 2: Convert to fraction form
    85,747.28/128,633.38 = 26,587.71/x
  3. Step 3: Cross multiply
    85,747.28x = 128,633.38 × 26,587.71
  4. Step 4: Simplify right side
    85,747.28x = 3,420,066,937.29
  5. Step 5: Solve for x
    x = 3,420,066,937.29/85,747.28
  6. Step 6: Final answer
    x = 39,885.43

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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.