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Finding the Fourth Proportional to 124,907.88, 172,372.86 and 68,319.12

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Solution

The fourth proportional to 124,907.88, 172,372.86 and 68,319.12 is: 94,280.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,907.88 : 172,372.86 = 68,319.12 : x
  2. Step 2: Convert to fraction form
    124,907.88/172,372.86 = 68,319.12/x
  3. Step 3: Cross multiply
    124,907.88x = 172,372.86 × 68,319.12
  4. Step 4: Simplify right side
    124,907.88x = 11,776,362,107.08
  5. Step 5: Solve for x
    x = 11,776,362,107.08/124,907.88
  6. Step 6: Final answer
    x = 94,280.38

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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.