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Finding the Fourth Proportional to 141,379.65, 212,047.47 and 91,811.16

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Solution

The fourth proportional to 141,379.65, 212,047.47 and 91,811.16 is: 137,702.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,379.65 : 212,047.47 = 91,811.16 : x
  2. Step 2: Convert to fraction form
    141,379.65/212,047.47 = 91,811.16/x
  3. Step 3: Cross multiply
    141,379.65x = 212,047.47 × 91,811.16
  4. Step 4: Simplify right side
    141,379.65x = 19,468,324,195.77
  5. Step 5: Solve for x
    x = 19,468,324,195.77/141,379.65
  6. Step 6: Final answer
    x = 137,702.45

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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.