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Finding the Fourth Proportional to 103,902.52, 143,437.62 and 68,147.32

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Solution

The fourth proportional to 103,902.52, 143,437.62 and 68,147.32 is: 94,077.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,902.52 : 143,437.62 = 68,147.32 : x
  2. Step 2: Convert to fraction form
    103,902.52/143,437.62 = 68,147.32/x
  3. Step 3: Cross multiply
    103,902.52x = 143,437.62 × 68,147.32
  4. Step 4: Simplify right side
    103,902.52x = 9,774,889,390.18
  5. Step 5: Solve for x
    x = 9,774,889,390.18/103,902.52
  6. Step 6: Final answer
    x = 94,077.50

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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.