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Finding the Fourth Proportional to 128,472.48, 192,423.54 and 98,670.96

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Solution

The fourth proportional to 128,472.48, 192,423.54 and 98,670.96 is: 147,787.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,472.48 : 192,423.54 = 98,670.96 : x
  2. Step 2: Convert to fraction form
    128,472.48/192,423.54 = 98,670.96/x
  3. Step 3: Cross multiply
    128,472.48x = 192,423.54 × 98,670.96
  4. Step 4: Simplify right side
    128,472.48x = 18,986,615,418.40
  5. Step 5: Solve for x
    x = 18,986,615,418.40/128,472.48
  6. Step 6: Final answer
    x = 147,787.41

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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.