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Finding the Fourth Proportional to 72,698.70, 109,062.45 and 61,092.30

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Solution

The fourth proportional to 72,698.70, 109,062.45 and 61,092.30 is: 91,650.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,698.70 : 109,062.45 = 61,092.30 : x
  2. Step 2: Convert to fraction form
    72,698.70/109,062.45 = 61,092.30/x
  3. Step 3: Cross multiply
    72,698.70x = 109,062.45 × 61,092.30
  4. Step 4: Simplify right side
    72,698.70x = 6,662,875,914.14
  5. Step 5: Solve for x
    x = 6,662,875,914.14/72,698.70
  6. Step 6: Final answer
    x = 91,650.55

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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.