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Finding the Fourth Proportional to 99,673.32, 149,055.42 and 74,390.70

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Solution

The fourth proportional to 99,673.32, 149,055.42 and 74,390.70 is: 111,246.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,673.32 : 149,055.42 = 74,390.70 : x
  2. Step 2: Convert to fraction form
    99,673.32/149,055.42 = 74,390.70/x
  3. Step 3: Cross multiply
    99,673.32x = 149,055.42 × 74,390.70
  4. Step 4: Simplify right side
    99,673.32x = 11,088,337,032.59
  5. Step 5: Solve for x
    x = 11,088,337,032.59/99,673.32
  6. Step 6: Final answer
    x = 111,246.79

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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.