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Finding the Fourth Proportional to 85,910.95, 128,870.07 and 26,747.74

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Solution

The fourth proportional to 85,910.95, 128,870.07 and 26,747.74 is: 40,122.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,910.95 : 128,870.07 = 26,747.74 : x
  2. Step 2: Convert to fraction form
    85,910.95/128,870.07 = 26,747.74/x
  3. Step 3: Cross multiply
    85,910.95x = 128,870.07 × 26,747.74
  4. Step 4: Simplify right side
    85,910.95x = 3,446,983,126.14
  5. Step 5: Solve for x
    x = 3,446,983,126.14/85,910.95
  6. Step 6: Final answer
    x = 40,122.74

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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.