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Finding the Fourth Proportional to 142,699.84, 213,181.92 and 92,369.92

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Solution

The fourth proportional to 142,699.84, 213,181.92 and 92,369.92 is: 137,993.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,699.84 : 213,181.92 = 92,369.92 : x
  2. Step 2: Convert to fraction form
    142,699.84/213,181.92 = 92,369.92/x
  3. Step 3: Cross multiply
    142,699.84x = 213,181.92 × 92,369.92
  4. Step 4: Simplify right side
    142,699.84x = 19,691,596,895.85
  5. Step 5: Solve for x
    x = 19,691,596,895.85/142,699.84
  6. Step 6: Final answer
    x = 137,993.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.