Home / 85,403.94-128,122.38-26,229.12

Finding the Fourth Proportional to 85,403.94, 128,122.38 and 26,229.12

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Solution

The fourth proportional to 85,403.94, 128,122.38 and 26,229.12 is: 39,348.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,403.94 : 128,122.38 = 26,229.12 : x
  2. Step 2: Convert to fraction form
    85,403.94/128,122.38 = 26,229.12/x
  3. Step 3: Cross multiply
    85,403.94x = 128,122.38 × 26,229.12
  4. Step 4: Simplify right side
    85,403.94x = 3,360,537,279.71
  5. Step 5: Solve for x
    x = 3,360,537,279.71/85,403.94
  6. Step 6: Final answer
    x = 39,348.74

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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.