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Finding the Fourth Proportional to 128,872.81, 193,364.57 and 62,362.63

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Solution

The fourth proportional to 128,872.81, 193,364.57 and 62,362.63 is: 93,570.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,872.81 : 193,364.57 = 62,362.63 : x
  2. Step 2: Convert to fraction form
    128,872.81/193,364.57 = 62,362.63/x
  3. Step 3: Cross multiply
    128,872.81x = 193,364.57 × 62,362.63
  4. Step 4: Simplify right side
    128,872.81x = 12,058,723,134.02
  5. Step 5: Solve for x
    x = 12,058,723,134.02/128,872.81
  6. Step 6: Final answer
    x = 93,570.73

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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.