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Finding the Fourth Proportional to 53,809.68, 80,737.74 and 20,539.74

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Solution

The fourth proportional to 53,809.68, 80,737.74 and 20,539.74 is: 30,818.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,809.68 : 80,737.74 = 20,539.74 : x
  2. Step 2: Convert to fraction form
    53,809.68/80,737.74 = 20,539.74/x
  3. Step 3: Cross multiply
    53,809.68x = 80,737.74 × 20,539.74
  4. Step 4: Simplify right side
    53,809.68x = 1,658,332,187.79
  5. Step 5: Solve for x
    x = 1,658,332,187.79/53,809.68
  6. Step 6: Final answer
    x = 30,818.47

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1.5x scale

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.