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Finding the Fourth Proportional to 141,879.12, 212,823.12 and 53,115.66

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Solution

The fourth proportional to 141,879.12, 212,823.12 and 53,115.66 is: 79,675.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,879.12 : 212,823.12 = 53,115.66 : x
  2. Step 2: Convert to fraction form
    141,879.12/212,823.12 = 53,115.66/x
  3. Step 3: Cross multiply
    141,879.12x = 212,823.12 × 53,115.66
  4. Step 4: Simplify right side
    141,879.12x = 11,304,240,482.06
  5. Step 5: Solve for x
    x = 11,304,240,482.06/141,879.12
  6. Step 6: Final answer
    x = 79,675.15

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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.