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Finding the Fourth Proportional to 123,357.15, 185,059.08 and 39,138.51

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Solution

The fourth proportional to 123,357.15, 185,059.08 and 39,138.51 is: 58,715.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,357.15 : 185,059.08 = 39,138.51 : x
  2. Step 2: Convert to fraction form
    123,357.15/185,059.08 = 39,138.51/x
  3. Step 3: Cross multiply
    123,357.15x = 185,059.08 × 39,138.51
  4. Step 4: Simplify right side
    123,357.15x = 7,242,936,653.17
  5. Step 5: Solve for x
    x = 7,242,936,653.17/123,357.15
  6. Step 6: Final answer
    x = 58,715.18

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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.