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Finding the Fourth Proportional to 106,871.90, 147,484.68 and 66,601.94

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Solution

The fourth proportional to 106,871.90, 147,484.68 and 66,601.94 is: 91,911.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,871.90 : 147,484.68 = 66,601.94 : x
  2. Step 2: Convert to fraction form
    106,871.90/147,484.68 = 66,601.94/x
  3. Step 3: Cross multiply
    106,871.90x = 147,484.68 × 66,601.94
  4. Step 4: Simplify right side
    106,871.90x = 9,822,765,808.28
  5. Step 5: Solve for x
    x = 9,822,765,808.28/106,871.90
  6. Step 6: Final answer
    x = 91,911.59

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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.