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Finding the Fourth Proportional to 78,909.35, 108,894.89 and 43,099.44

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Solution

The fourth proportional to 78,909.35, 108,894.89 and 43,099.44 is: 59,477.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,909.35 : 108,894.89 = 43,099.44 : x
  2. Step 2: Convert to fraction form
    78,909.35/108,894.89 = 43,099.44/x
  3. Step 3: Cross multiply
    78,909.35x = 108,894.89 × 43,099.44
  4. Step 4: Simplify right side
    78,909.35x = 4,693,308,885.61
  5. Step 5: Solve for x
    x = 4,693,308,885.61/78,909.35
  6. Step 6: Final answer
    x = 59,477.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.