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Finding the Fourth Proportional to 61,133.48, 91,713.99 and 21,690.53

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Solution

The fourth proportional to 61,133.48, 91,713.99 and 21,690.53 is: 32,540.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,133.48 : 91,713.99 = 21,690.53 : x
  2. Step 2: Convert to fraction form
    61,133.48/91,713.99 = 21,690.53/x
  3. Step 3: Cross multiply
    61,133.48x = 91,713.99 × 21,690.53
  4. Step 4: Simplify right side
    61,133.48x = 1,989,325,051.51
  5. Step 5: Solve for x
    x = 1,989,325,051.51/61,133.48
  6. Step 6: Final answer
    x = 32,540.68

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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.