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Finding the Fourth Proportional to 72,440.73, 108,648.95 and 19,840.95

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Solution

The fourth proportional to 72,440.73, 108,648.95 and 19,840.95 is: 29,758.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,440.73 : 108,648.95 = 19,840.95 : x
  2. Step 2: Convert to fraction form
    72,440.73/108,648.95 = 19,840.95/x
  3. Step 3: Cross multiply
    72,440.73x = 108,648.95 × 19,840.95
  4. Step 4: Simplify right side
    72,440.73x = 2,155,698,285.30
  5. Step 5: Solve for x
    x = 2,155,698,285.30/72,440.73
  6. Step 6: Final answer
    x = 29,758.10

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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.