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Finding the Fourth Proportional to 72,918.01, 109,335.30 and 43,356.52

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Solution

The fourth proportional to 72,918.01, 109,335.30 and 43,356.52 is: 65,009.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,918.01 : 109,335.30 = 43,356.52 : x
  2. Step 2: Convert to fraction form
    72,918.01/109,335.30 = 43,356.52/x
  3. Step 3: Cross multiply
    72,918.01x = 109,335.30 × 43,356.52
  4. Step 4: Simplify right side
    72,918.01x = 4,740,398,121.16
  5. Step 5: Solve for x
    x = 4,740,398,121.16/72,918.01
  6. Step 6: Final answer
    x = 65,009.98

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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.