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Finding the Fourth Proportional to 141,642.60, 212,237.10 and 74,995.80

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Solution

The fourth proportional to 141,642.60, 212,237.10 and 74,995.80 is: 112,373.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,642.60 : 212,237.10 = 74,995.80 : x
  2. Step 2: Convert to fraction form
    141,642.60/212,237.10 = 74,995.80/x
  3. Step 3: Cross multiply
    141,642.60x = 212,237.10 × 74,995.80
  4. Step 4: Simplify right side
    141,642.60x = 15,916,891,104.18
  5. Step 5: Solve for x
    x = 15,916,891,104.18/141,642.60
  6. Step 6: Final answer
    x = 112,373.62

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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.