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Finding the Fourth Proportional to 141,841.71, 212,845.48 and 78,714.86

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Solution

The fourth proportional to 141,841.71, 212,845.48 and 78,714.86 is: 118,118.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,841.71 : 212,845.48 = 78,714.86 : x
  2. Step 2: Convert to fraction form
    141,841.71/212,845.48 = 78,714.86/x
  3. Step 3: Cross multiply
    141,841.71x = 212,845.48 × 78,714.86
  4. Step 4: Simplify right side
    141,841.71x = 16,754,100,898.82
  5. Step 5: Solve for x
    x = 16,754,100,898.82/141,841.71
  6. Step 6: Final answer
    x = 118,118.29

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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.