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Finding the Fourth Proportional to 139,177.53, 208,779.96 and 39,338.49

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Solution

The fourth proportional to 139,177.53, 208,779.96 and 39,338.49 is: 59,011.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,177.53 : 208,779.96 = 39,338.49 : x
  2. Step 2: Convert to fraction form
    139,177.53/208,779.96 = 39,338.49/x
  3. Step 3: Cross multiply
    139,177.53x = 208,779.96 × 39,338.49
  4. Step 4: Simplify right side
    139,177.53x = 8,213,088,368.66
  5. Step 5: Solve for x
    x = 8,213,088,368.66/139,177.53
  6. Step 6: Final answer
    x = 59,011.60

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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.