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Finding the Fourth Proportional to 141,801.66, 212,785.53 and 78,674.59

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Solution

The fourth proportional to 141,801.66, 212,785.53 and 78,674.59 is: 118,057.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,801.66 : 212,785.53 = 78,674.59 : x
  2. Step 2: Convert to fraction form
    141,801.66/212,785.53 = 78,674.59/x
  3. Step 3: Cross multiply
    141,801.66x = 212,785.53 × 78,674.59
  4. Step 4: Simplify right side
    141,801.66x = 16,740,814,744.18
  5. Step 5: Solve for x
    x = 16,740,814,744.18/141,801.66
  6. Step 6: Final answer
    x = 118,057.96

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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.