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Finding the Fourth Proportional to 141,357.69, 212,036.67 and 66,422.88

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Solution

The fourth proportional to 141,357.69, 212,036.67 and 66,422.88 is: 99,634.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,357.69 : 212,036.67 = 66,422.88 : x
  2. Step 2: Convert to fraction form
    141,357.69/212,036.67 = 66,422.88/x
  3. Step 3: Cross multiply
    141,357.69x = 212,036.67 × 66,422.88
  4. Step 4: Simplify right side
    141,357.69x = 14,084,086,287.01
  5. Step 5: Solve for x
    x = 14,084,086,287.01/141,357.69
  6. Step 6: Final answer
    x = 99,634.38

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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.