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Finding the Fourth Proportional to 205,695.40, 308,543.10 and 72,574.60

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Solution

The fourth proportional to 205,695.40, 308,543.10 and 72,574.60 is: 108,861.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,695.40 : 308,543.10 = 72,574.60 : x
  2. Step 2: Convert to fraction form
    205,695.40/308,543.10 = 72,574.60/x
  3. Step 3: Cross multiply
    205,695.40x = 308,543.10 × 72,574.60
  4. Step 4: Simplify right side
    205,695.40x = 22,392,392,065.26
  5. Step 5: Solve for x
    x = 22,392,392,065.26/205,695.40
  6. Step 6: Final answer
    x = 108,861.90

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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.