Home / 209,215.48-288,723-113,728.66

Finding the Fourth Proportional to 209,215.48, 288,723 and 113,728.66

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Solution

The fourth proportional to 209,215.48, 288,723 and 113,728.66 is: 156,948.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,215.48 : 288,723 = 113,728.66 : x
  2. Step 2: Convert to fraction form
    209,215.48/288,723 = 113,728.66/x
  3. Step 3: Cross multiply
    209,215.48x = 288,723 × 113,728.66
  4. Step 4: Simplify right side
    209,215.48x = 32,836,079,901.18
  5. Step 5: Solve for x
    x = 32,836,079,901.18/209,215.48
  6. Step 6: Final answer
    x = 156,948.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.