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Finding the Fourth Proportional to 138,885.52, 208,338.06 and 55,779.52

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Solution

The fourth proportional to 138,885.52, 208,338.06 and 55,779.52 is: 83,673.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,885.52 : 208,338.06 = 55,779.52 : x
  2. Step 2: Convert to fraction form
    138,885.52/208,338.06 = 55,779.52/x
  3. Step 3: Cross multiply
    138,885.52x = 208,338.06 × 55,779.52
  4. Step 4: Simplify right side
    138,885.52x = 11,620,996,984.53
  5. Step 5: Solve for x
    x = 11,620,996,984.53/138,885.52
  6. Step 6: Final answer
    x = 83,673.21

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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.