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Finding the Fourth Proportional to 192,215.80, 288,323.70 and 139,071.70

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Solution

The fourth proportional to 192,215.80, 288,323.70 and 139,071.70 is: 208,607.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,215.80 : 288,323.70 = 139,071.70 : x
  2. Step 2: Convert to fraction form
    192,215.80/288,323.70 = 139,071.70/x
  3. Step 3: Cross multiply
    192,215.80x = 288,323.70 × 139,071.70
  4. Step 4: Simplify right side
    192,215.80x = 40,097,667,109.29
  5. Step 5: Solve for x
    x = 40,097,667,109.29/192,215.80
  6. Step 6: Final answer
    x = 208,607.55

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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.