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Finding the Fourth Proportional to 106,989.91, 147,717.80 and 66,719.95

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Solution

The fourth proportional to 106,989.91, 147,717.80 and 66,719.95 is: 92,118.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,989.91 : 147,717.80 = 66,719.95 : x
  2. Step 2: Convert to fraction form
    106,989.91/147,717.80 = 66,719.95/x
  3. Step 3: Cross multiply
    106,989.91x = 147,717.80 × 66,719.95
  4. Step 4: Simplify right side
    106,989.91x = 9,855,724,230.11
  5. Step 5: Solve for x
    x = 9,855,724,230.11/106,989.91
  6. Step 6: Final answer
    x = 92,118.26

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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.