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Finding the Fourth Proportional to 61,062.90, 91,607.42 and 18,942.07

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Solution

The fourth proportional to 61,062.90, 91,607.42 and 18,942.07 is: 28,417.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,062.90 : 91,607.42 = 18,942.07 : x
  2. Step 2: Convert to fraction form
    61,062.90/91,607.42 = 18,942.07/x
  3. Step 3: Cross multiply
    61,062.90x = 91,607.42 × 18,942.07
  4. Step 4: Simplify right side
    61,062.90x = 1,735,234,162.16
  5. Step 5: Solve for x
    x = 1,735,234,162.16/61,062.90
  6. Step 6: Final answer
    x = 28,417.16

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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.