Home / 61,121.16-91,659.20-21,130.02

Finding the Fourth Proportional to 61,121.16, 91,659.20 and 21,130.02

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Solution

The fourth proportional to 61,121.16, 91,659.20 and 21,130.02 is: 31,687.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,121.16 : 91,659.20 = 21,130.02 : x
  2. Step 2: Convert to fraction form
    61,121.16/91,659.20 = 21,130.02/x
  3. Step 3: Cross multiply
    61,121.16x = 91,659.20 × 21,130.02
  4. Step 4: Simplify right side
    61,121.16x = 1,936,760,623.53
  5. Step 5: Solve for x
    x = 1,936,760,623.53/61,121.16
  6. Step 6: Final answer
    x = 31,687.24

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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.