Home / 141,378.09-212,136.32-66,505.79

Finding the Fourth Proportional to 141,378.09, 212,136.32 and 66,505.79

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Solution

The fourth proportional to 141,378.09, 212,136.32 and 66,505.79 is: 99,791.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,378.09 : 212,136.32 = 66,505.79 : x
  2. Step 2: Convert to fraction form
    141,378.09/212,136.32 = 66,505.79/x
  3. Step 3: Cross multiply
    141,378.09x = 212,136.32 × 66,505.79
  4. Step 4: Simplify right side
    141,378.09x = 14,108,293,216.76
  5. Step 5: Solve for x
    x = 14,108,293,216.76/141,378.09
  6. Step 6: Final answer
    x = 99,791.23

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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.