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Finding the Fourth Proportional to 61,085.04, 91,621.80 and 19,520.88

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Solution

The fourth proportional to 61,085.04, 91,621.80 and 19,520.88 is: 29,279.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,085.04 : 91,621.80 = 19,520.88 : x
  2. Step 2: Convert to fraction form
    61,085.04/91,621.80 = 19,520.88/x
  3. Step 3: Cross multiply
    61,085.04x = 91,621.80 × 19,520.88
  4. Step 4: Simplify right side
    61,085.04x = 1,788,538,163.18
  5. Step 5: Solve for x
    x = 1,788,538,163.18/61,085.04
  6. Step 6: Final answer
    x = 29,279.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.