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Finding the Fourth Proportional to 67,766.13, 101,648.18 and 21,019.01

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Solution

The fourth proportional to 67,766.13, 101,648.18 and 21,019.01 is: 31,528.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,766.13 : 101,648.18 = 21,019.01 : x
  2. Step 2: Convert to fraction form
    67,766.13/101,648.18 = 21,019.01/x
  3. Step 3: Cross multiply
    67,766.13x = 101,648.18 × 21,019.01
  4. Step 4: Simplify right side
    67,766.13x = 2,136,543,656.21
  5. Step 5: Solve for x
    x = 2,136,543,656.21/67,766.13
  6. Step 6: Final answer
    x = 31,528.19

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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.