Home / 66,123.12-99,171.72-19,365.12

Finding the Fourth Proportional to 66,123.12, 99,171.72 and 19,365.12

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Solution

The fourth proportional to 66,123.12, 99,171.72 and 19,365.12 is: 29,043.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,123.12 : 99,171.72 = 19,365.12 : x
  2. Step 2: Convert to fraction form
    66,123.12/99,171.72 = 19,365.12/x
  3. Step 3: Cross multiply
    66,123.12x = 99,171.72 × 19,365.12
  4. Step 4: Simplify right side
    66,123.12x = 1,920,472,258.41
  5. Step 5: Solve for x
    x = 1,920,472,258.41/66,123.12
  6. Step 6: Final answer
    x = 29,043.88

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1.5x scale

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.