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Finding the Fourth Proportional to 72,285.80, 108,477.30 and 40,695.80

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Solution

The fourth proportional to 72,285.80, 108,477.30 and 40,695.80 is: 61,071.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,285.80 : 108,477.30 = 40,695.80 : x
  2. Step 2: Convert to fraction form
    72,285.80/108,477.30 = 40,695.80/x
  3. Step 3: Cross multiply
    72,285.80x = 108,477.30 × 40,695.80
  4. Step 4: Simplify right side
    72,285.80x = 4,414,570,505.34
  5. Step 5: Solve for x
    x = 4,414,570,505.34/72,285.80
  6. Step 6: Final answer
    x = 61,071.06

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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.