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Finding the Fourth Proportional to 72,929.60, 109,394.40 and 41,739.20

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Solution

The fourth proportional to 72,929.60, 109,394.40 and 41,739.20 is: 62,608.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,929.60 : 109,394.40 = 41,739.20 : x
  2. Step 2: Convert to fraction form
    72,929.60/109,394.40 = 41,739.20/x
  3. Step 3: Cross multiply
    72,929.60x = 109,394.40 × 41,739.20
  4. Step 4: Simplify right side
    72,929.60x = 4,566,034,740.48
  5. Step 5: Solve for x
    x = 4,566,034,740.48/72,929.60
  6. Step 6: Final answer
    x = 62,608.80

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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.