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Finding the Fourth Proportional to 78,857.90, 118,332.21 and 43,794.62

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Solution

The fourth proportional to 78,857.90, 118,332.21 and 43,794.62 is: 65,717.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,857.90 : 118,332.21 = 43,794.62 : x
  2. Step 2: Convert to fraction form
    78,857.90/118,332.21 = 43,794.62/x
  3. Step 3: Cross multiply
    78,857.90x = 118,332.21 × 43,794.62
  4. Step 4: Simplify right side
    78,857.90x = 5,182,314,170.71
  5. Step 5: Solve for x
    x = 5,182,314,170.71/78,857.90
  6. Step 6: Final answer
    x = 65,717.12

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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.