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Finding the Fourth Proportional to 72,292.82, 99,791.70 and 64,725.80

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Solution

The fourth proportional to 72,292.82, 99,791.70 and 64,725.80 is: 89,346.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,292.82 : 99,791.70 = 64,725.80 : x
  2. Step 2: Convert to fraction form
    72,292.82/99,791.70 = 64,725.80/x
  3. Step 3: Cross multiply
    72,292.82x = 99,791.70 × 64,725.80
  4. Step 4: Simplify right side
    72,292.82x = 6,459,097,615.86
  5. Step 5: Solve for x
    x = 6,459,097,615.86/72,292.82
  6. Step 6: Final answer
    x = 89,346.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.