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Finding the Fourth Proportional to 239,284.66, 330,212.86 and 138,740.98

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Solution

The fourth proportional to 239,284.66, 330,212.86 and 138,740.98 is: 191,462.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,284.66 : 330,212.86 = 138,740.98 : x
  2. Step 2: Convert to fraction form
    239,284.66/330,212.86 = 138,740.98/x
  3. Step 3: Cross multiply
    239,284.66x = 330,212.86 × 138,740.98
  4. Step 4: Simplify right side
    239,284.66x = 45,814,055,805.00
  5. Step 5: Solve for x
    x = 45,814,055,805.00/239,284.66
  6. Step 6: Final answer
    x = 191,462.57

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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.