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Finding the Fourth Proportional to 109,215.66, 150,717.96 and 61,469.76

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Solution

The fourth proportional to 109,215.66, 150,717.96 and 61,469.76 is: 84,828.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,215.66 : 150,717.96 = 61,469.76 : x
  2. Step 2: Convert to fraction form
    109,215.66/150,717.96 = 61,469.76/x
  3. Step 3: Cross multiply
    109,215.66x = 150,717.96 × 61,469.76
  4. Step 4: Simplify right side
    109,215.66x = 9,264,596,828.89
  5. Step 5: Solve for x
    x = 9,264,596,828.89/109,215.66
  6. Step 6: Final answer
    x = 84,828.47

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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.