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Finding the Fourth Proportional to 131,370, 181,290.60 and 71,754

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Solution

The fourth proportional to 131,370, 181,290.60 and 71,754 is: 99,020.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,370 : 181,290.60 = 71,754 : x
  2. Step 2: Convert to fraction form
    131,370/181,290.60 = 71,754/x
  3. Step 3: Cross multiply
    131,370x = 181,290.60 × 71,754
  4. Step 4: Simplify right side
    131,370x = 13,008,325,712.40
  5. Step 5: Solve for x
    x = 13,008,325,712.40/131,370
  6. Step 6: Final answer
    x = 99,020.52

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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.