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Finding the Fourth Proportional to 78,911.82, 118,330.67 and 28,957.10

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Solution

The fourth proportional to 78,911.82, 118,330.67 and 28,957.10 is: 43,422.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,911.82 : 118,330.67 = 28,957.10 : x
  2. Step 2: Convert to fraction form
    78,911.82/118,330.67 = 28,957.10/x
  3. Step 3: Cross multiply
    78,911.82x = 118,330.67 × 28,957.10
  4. Step 4: Simplify right side
    78,911.82x = 3,426,512,525.00
  5. Step 5: Solve for x
    x = 3,426,512,525.00/78,911.82
  6. Step 6: Final answer
    x = 43,422.04

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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.