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Finding the Fourth Proportional to 72,387.88, 108,803.25 and 70,837.54

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Solution

The fourth proportional to 72,387.88, 108,803.25 and 70,837.54 is: 106,473.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,387.88 : 108,803.25 = 70,837.54 : x
  2. Step 2: Convert to fraction form
    72,387.88/108,803.25 = 70,837.54/x
  3. Step 3: Cross multiply
    72,387.88x = 108,803.25 × 70,837.54
  4. Step 4: Simplify right side
    72,387.88x = 7,707,354,302.00
  5. Step 5: Solve for x
    x = 7,707,354,302.00/72,387.88
  6. Step 6: Final answer
    x = 106,473.00

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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.