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Finding the Fourth Proportional to 72,892.48, 109,373.28 and 43,368.64

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Solution

The fourth proportional to 72,892.48, 109,373.28 and 43,368.64 is: 65,073.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,892.48 : 109,373.28 = 43,368.64 : x
  2. Step 2: Convert to fraction form
    72,892.48/109,373.28 = 43,368.64/x
  3. Step 3: Cross multiply
    72,892.48x = 109,373.28 × 43,368.64
  4. Step 4: Simplify right side
    72,892.48x = 4,743,370,405.94
  5. Step 5: Solve for x
    x = 4,743,370,405.94/72,892.48
  6. Step 6: Final answer
    x = 65,073.52

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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.