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Finding the Fourth Proportional to 85,641.74, 128,468.77 and 26,469.72

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Solution

The fourth proportional to 85,641.74, 128,468.77 and 26,469.72 is: 39,706.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,641.74 : 128,468.77 = 26,469.72 : x
  2. Step 2: Convert to fraction form
    85,641.74/128,468.77 = 26,469.72/x
  3. Step 3: Cross multiply
    85,641.74x = 128,468.77 × 26,469.72
  4. Step 4: Simplify right side
    85,641.74x = 3,400,532,304.47
  5. Step 5: Solve for x
    x = 3,400,532,304.47/85,641.74
  6. Step 6: Final answer
    x = 39,706.48

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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.