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Finding the Fourth Proportional to 72,894.48, 109,376.28 and 43,370.64

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Solution

The fourth proportional to 72,894.48, 109,376.28 and 43,370.64 is: 65,076.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,894.48 : 109,376.28 = 43,370.64 : x
  2. Step 2: Convert to fraction form
    72,894.48/109,376.28 = 43,370.64/x
  3. Step 3: Cross multiply
    72,894.48x = 109,376.28 × 43,370.64
  4. Step 4: Simplify right side
    72,894.48x = 4,743,719,264.42
  5. Step 5: Solve for x
    x = 4,743,719,264.42/72,894.48
  6. Step 6: Final answer
    x = 65,076.52

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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.