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Finding the Fourth Proportional to 85,679.78, 128,524.45 and 26,510.83

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Solution

The fourth proportional to 85,679.78, 128,524.45 and 26,510.83 is: 39,767.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,679.78 : 128,524.45 = 26,510.83 : x
  2. Step 2: Convert to fraction form
    85,679.78/128,524.45 = 26,510.83/x
  3. Step 3: Cross multiply
    85,679.78x = 128,524.45 × 26,510.83
  4. Step 4: Simplify right side
    85,679.78x = 3,407,289,844.79
  5. Step 5: Solve for x
    x = 3,407,289,844.79/85,679.78
  6. Step 6: Final answer
    x = 39,767.72

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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.