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Finding the Fourth Proportional to 155,062.01, 213,990.74 and 87,090.95

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Solution

The fourth proportional to 155,062.01, 213,990.74 and 87,090.95 is: 120,188.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,062.01 : 213,990.74 = 87,090.95 : x
  2. Step 2: Convert to fraction form
    155,062.01/213,990.74 = 87,090.95/x
  3. Step 3: Cross multiply
    155,062.01x = 213,990.74 × 87,090.95
  4. Step 4: Simplify right side
    155,062.01x = 18,636,656,937.33
  5. Step 5: Solve for x
    x = 18,636,656,937.33/155,062.01
  6. Step 6: Final answer
    x = 120,188.42

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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.