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Finding the Fourth Proportional to 131,486.96, 181,453.56 and 71,870.96

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Solution

The fourth proportional to 131,486.96, 181,453.56 and 71,870.96 is: 99,182.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,486.96 : 181,453.56 = 71,870.96 : x
  2. Step 2: Convert to fraction form
    131,486.96/181,453.56 = 71,870.96/x
  3. Step 3: Cross multiply
    131,486.96x = 181,453.56 × 71,870.96
  4. Step 4: Simplify right side
    131,486.96x = 13,041,241,552.62
  5. Step 5: Solve for x
    x = 13,041,241,552.62/131,486.96
  6. Step 6: Final answer
    x = 99,182.77

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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.