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Finding the Fourth Proportional to 91,054.40, 136,516.80 and 34,872.80

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Solution

The fourth proportional to 91,054.40, 136,516.80 and 34,872.80 is: 52,284.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,054.40 : 136,516.80 = 34,872.80 : x
  2. Step 2: Convert to fraction form
    91,054.40/136,516.80 = 34,872.80/x
  3. Step 3: Cross multiply
    91,054.40x = 136,516.80 × 34,872.80
  4. Step 4: Simplify right side
    91,054.40x = 4,760,723,063.04
  5. Step 5: Solve for x
    x = 4,760,723,063.04/91,054.40
  6. Step 6: Final answer
    x = 52,284.38

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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.