Home / 205,811.40-308,717.10-72,690.60

Finding the Fourth Proportional to 205,811.40, 308,717.10 and 72,690.60

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Solution

The fourth proportional to 205,811.40, 308,717.10 and 72,690.60 is: 109,035.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,811.40 : 308,717.10 = 72,690.60 : x
  2. Step 2: Convert to fraction form
    205,811.40/308,717.10 = 72,690.60/x
  3. Step 3: Cross multiply
    205,811.40x = 308,717.10 × 72,690.60
  4. Step 4: Simplify right side
    205,811.40x = 22,440,831,229.26
  5. Step 5: Solve for x
    x = 22,440,831,229.26/205,811.40
  6. Step 6: Final answer
    x = 109,035.90

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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.