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Finding the Fourth Proportional to 155,820.80, 215,032.60 and 84,200.79

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Solution

The fourth proportional to 155,820.80, 215,032.60 and 84,200.79 is: 116,197.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,820.80 : 215,032.60 = 84,200.79 : x
  2. Step 2: Convert to fraction form
    155,820.80/215,032.60 = 84,200.79/x
  3. Step 3: Cross multiply
    155,820.80x = 215,032.60 × 84,200.79
  4. Step 4: Simplify right side
    155,820.80x = 18,105,914,795.75
  5. Step 5: Solve for x
    x = 18,105,914,795.75/155,820.80
  6. Step 6: Final answer
    x = 116,197.03

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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.