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Finding the Fourth Proportional to 123,509.78, 170,435.58 and 69,066.44

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Solution

The fourth proportional to 123,509.78, 170,435.58 and 69,066.44 is: 95,307.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,509.78 : 170,435.58 = 69,066.44 : x
  2. Step 2: Convert to fraction form
    123,509.78/170,435.58 = 69,066.44/x
  3. Step 3: Cross multiply
    123,509.78x = 170,435.58 × 69,066.44
  4. Step 4: Simplify right side
    123,509.78x = 11,771,377,907.76
  5. Step 5: Solve for x
    x = 11,771,377,907.76/123,509.78
  6. Step 6: Final answer
    x = 95,307.26

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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.