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Finding the Fourth Proportional to 279,106.71, 385,163.65 and 151,779.57

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Solution

The fourth proportional to 279,106.71, 385,163.65 and 151,779.57 is: 209,453.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,106.71 : 385,163.65 = 151,779.57 : x
  2. Step 2: Convert to fraction form
    279,106.71/385,163.65 = 151,779.57/x
  3. Step 3: Cross multiply
    279,106.71x = 385,163.65 × 151,779.57
  4. Step 4: Simplify right side
    279,106.71x = 58,459,972,417.73
  5. Step 5: Solve for x
    x = 58,459,972,417.73/279,106.71
  6. Step 6: Final answer
    x = 209,453.84

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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.