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Finding the Fourth Proportional to 78,750.75, 118,089.18 and 28,795.91

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Solution

The fourth proportional to 78,750.75, 118,089.18 and 28,795.91 is: 43,180.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,750.75 : 118,089.18 = 28,795.91 : x
  2. Step 2: Convert to fraction form
    78,750.75/118,089.18 = 28,795.91/x
  3. Step 3: Cross multiply
    78,750.75x = 118,089.18 × 28,795.91
  4. Step 4: Simplify right side
    78,750.75x = 3,400,485,143.66
  5. Step 5: Solve for x
    x = 3,400,485,143.66/78,750.75
  6. Step 6: Final answer
    x = 43,180.35

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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.