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Finding the Fourth Proportional to 90,859.73, 136,162.01 and 77,463.44

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Solution

The fourth proportional to 90,859.73, 136,162.01 and 77,463.44 is: 116,086.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,859.73 : 136,162.01 = 77,463.44 : x
  2. Step 2: Convert to fraction form
    90,859.73/136,162.01 = 77,463.44/x
  3. Step 3: Cross multiply
    90,859.73x = 136,162.01 × 77,463.44
  4. Step 4: Simplify right side
    90,859.73x = 10,547,576,623.79
  5. Step 5: Solve for x
    x = 10,547,576,623.79/90,859.73
  6. Step 6: Final answer
    x = 116,086.38

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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.