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Finding the Fourth Proportional to 72,710.60, 100,272.87 and 47,189.66

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Solution

The fourth proportional to 72,710.60, 100,272.87 and 47,189.66 is: 65,077.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,710.60 : 100,272.87 = 47,189.66 : x
  2. Step 2: Convert to fraction form
    72,710.60/100,272.87 = 47,189.66/x
  3. Step 3: Cross multiply
    72,710.60x = 100,272.87 × 47,189.66
  4. Step 4: Simplify right side
    72,710.60x = 4,731,842,141.16
  5. Step 5: Solve for x
    x = 4,731,842,141.16/72,710.60
  6. Step 6: Final answer
    x = 65,077.75

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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.