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Finding the Fourth Proportional to 48,398.98, 72,601.67 and 12,859.78

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Solution

The fourth proportional to 48,398.98, 72,601.67 and 12,859.78 is: 19,290.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,398.98 : 72,601.67 = 12,859.78 : x
  2. Step 2: Convert to fraction form
    48,398.98/72,601.67 = 12,859.78/x
  3. Step 3: Cross multiply
    48,398.98x = 72,601.67 × 12,859.78
  4. Step 4: Simplify right side
    48,398.98x = 933,641,503.83
  5. Step 5: Solve for x
    x = 933,641,503.83/48,398.98
  6. Step 6: Final answer
    x = 19,290.52

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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.