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Finding the Fourth Proportional to 60,709.40, 91,066.80 and 20,727.80

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Solution

The fourth proportional to 60,709.40, 91,066.80 and 20,727.80 is: 31,092.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,709.40 : 91,066.80 = 20,727.80 : x
  2. Step 2: Convert to fraction form
    60,709.40/91,066.80 = 20,727.80/x
  3. Step 3: Cross multiply
    60,709.40x = 91,066.80 × 20,727.80
  4. Step 4: Simplify right side
    60,709.40x = 1,887,614,417.04
  5. Step 5: Solve for x
    x = 1,887,614,417.04/60,709.40
  6. Step 6: Final answer
    x = 31,092.62

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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.