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Finding the Fourth Proportional to 144,107.58, 198,871.80 and 90,394.86

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Solution

The fourth proportional to 144,107.58, 198,871.80 and 90,394.86 is: 124,747.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,107.58 : 198,871.80 = 90,394.86 : x
  2. Step 2: Convert to fraction form
    144,107.58/198,871.80 = 90,394.86/x
  3. Step 3: Cross multiply
    144,107.58x = 198,871.80 × 90,394.86
  4. Step 4: Simplify right side
    144,107.58x = 17,976,988,518.95
  5. Step 5: Solve for x
    x = 17,976,988,518.95/144,107.58
  6. Step 6: Final answer
    x = 124,747.00

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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.