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Finding the Fourth Proportional to 78,811.60, 118,217.40 and 32,040.40

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Solution

The fourth proportional to 78,811.60, 118,217.40 and 32,040.40 is: 48,060.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,811.60 : 118,217.40 = 32,040.40 : x
  2. Step 2: Convert to fraction form
    78,811.60/118,217.40 = 32,040.40/x
  3. Step 3: Cross multiply
    78,811.60x = 118,217.40 × 32,040.40
  4. Step 4: Simplify right side
    78,811.60x = 3,787,732,782.96
  5. Step 5: Solve for x
    x = 3,787,732,782.96/78,811.60
  6. Step 6: Final answer
    x = 48,060.60

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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.