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Finding the Fourth Proportional to 85,660.61, 128,490.91 and 26,496.79

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Solution

The fourth proportional to 85,660.61, 128,490.91 and 26,496.79 is: 39,745.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,660.61 : 128,490.91 = 26,496.79 : x
  2. Step 2: Convert to fraction form
    85,660.61/128,490.91 = 26,496.79/x
  3. Step 3: Cross multiply
    85,660.61x = 128,490.91 × 26,496.79
  4. Step 4: Simplify right side
    85,660.61x = 3,404,596,271.71
  5. Step 5: Solve for x
    x = 3,404,596,271.71/85,660.61
  6. Step 6: Final answer
    x = 39,745.18

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Similar ratio
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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.