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Finding the Fourth Proportional to 139,300.93, 208,881.23 and 68,228.90

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Solution

The fourth proportional to 139,300.93, 208,881.23 and 68,228.90 is: 102,308.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,300.93 : 208,881.23 = 68,228.90 : x
  2. Step 2: Convert to fraction form
    139,300.93/208,881.23 = 68,228.90/x
  3. Step 3: Cross multiply
    139,300.93x = 208,881.23 × 68,228.90
  4. Step 4: Simplify right side
    139,300.93x = 14,251,736,335.09
  5. Step 5: Solve for x
    x = 14,251,736,335.09/139,300.93
  6. Step 6: Final answer
    x = 102,308.98

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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.