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Finding the Fourth Proportional to 65,990.22, 98,985.20 and 18,605.22

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Solution

The fourth proportional to 65,990.22, 98,985.20 and 18,605.22 is: 27,907.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,990.22 : 98,985.20 = 18,605.22 : x
  2. Step 2: Convert to fraction form
    65,990.22/98,985.20 = 18,605.22/x
  3. Step 3: Cross multiply
    65,990.22x = 98,985.20 × 18,605.22
  4. Step 4: Simplify right side
    65,990.22x = 1,841,641,422.74
  5. Step 5: Solve for x
    x = 1,841,641,422.74/65,990.22
  6. Step 6: Final answer
    x = 27,907.79

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1.5x scale

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.