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Finding the Fourth Proportional to 192,187.80, 288,281.70 and 139,043.70

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Solution

The fourth proportional to 192,187.80, 288,281.70 and 139,043.70 is: 208,565.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,187.80 : 288,281.70 = 139,043.70 : x
  2. Step 2: Convert to fraction form
    192,187.80/288,281.70 = 139,043.70/x
  3. Step 3: Cross multiply
    192,187.80x = 288,281.70 × 139,043.70
  4. Step 4: Simplify right side
    192,187.80x = 40,083,754,210.29
  5. Step 5: Solve for x
    x = 40,083,754,210.29/192,187.80
  6. Step 6: Final answer
    x = 208,565.55

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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.