Home / 120,629.59-166,488.79-66,931.90

Finding the Fourth Proportional to 120,629.59, 166,488.79 and 66,931.90

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Solution

The fourth proportional to 120,629.59, 166,488.79 and 66,931.90 is: 92,377.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,629.59 : 166,488.79 = 66,931.90 : x
  2. Step 2: Convert to fraction form
    120,629.59/166,488.79 = 66,931.90/x
  3. Step 3: Cross multiply
    120,629.59x = 166,488.79 × 66,931.90
  4. Step 4: Simplify right side
    120,629.59x = 11,143,411,710.09
  5. Step 5: Solve for x
    x = 11,143,411,710.09/120,629.59
  6. Step 6: Final answer
    x = 92,377.10

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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.