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Finding the Fourth Proportional to 61,149.60, 91,730.68 and 21,168.52

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Solution

The fourth proportional to 61,149.60, 91,730.68 and 21,168.52 is: 31,754.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,149.60 : 91,730.68 = 21,168.52 : x
  2. Step 2: Convert to fraction form
    61,149.60/91,730.68 = 21,168.52/x
  3. Step 3: Cross multiply
    61,149.60x = 91,730.68 × 21,168.52
  4. Step 4: Simplify right side
    61,149.60x = 1,941,802,967.93
  5. Step 5: Solve for x
    x = 1,941,802,967.93/61,149.60
  6. Step 6: Final answer
    x = 31,754.96

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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.