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Finding the Fourth Proportional to 72,474.90, 108,712.35 and 31,002.90

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Solution

The fourth proportional to 72,474.90, 108,712.35 and 31,002.90 is: 46,504.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,474.90 : 108,712.35 = 31,002.90 : x
  2. Step 2: Convert to fraction form
    72,474.90/108,712.35 = 31,002.90/x
  3. Step 3: Cross multiply
    72,474.90x = 108,712.35 × 31,002.90
  4. Step 4: Simplify right side
    72,474.90x = 3,370,398,115.82
  5. Step 5: Solve for x
    x = 3,370,398,115.82/72,474.90
  6. Step 6: Final answer
    x = 46,504.35

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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.