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Finding the Fourth Proportional to 279,602.21, 385,860.71 and 158,739.48

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Solution

The fourth proportional to 279,602.21, 385,860.71 and 158,739.48 is: 219,065.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,602.21 : 385,860.71 = 158,739.48 : x
  2. Step 2: Convert to fraction form
    279,602.21/385,860.71 = 158,739.48/x
  3. Step 3: Cross multiply
    279,602.21x = 385,860.71 × 158,739.48
  4. Step 4: Simplify right side
    279,602.21x = 61,251,328,854.68
  5. Step 5: Solve for x
    x = 61,251,328,854.68/279,602.21
  6. Step 6: Final answer
    x = 219,065.97

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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.