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Finding the Fourth Proportional to 61,699.88, 92,538.14 and 30,078.18

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Solution

The fourth proportional to 61,699.88, 92,538.14 and 30,078.18 is: 45,111.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,699.88 : 92,538.14 = 30,078.18 : x
  2. Step 2: Convert to fraction form
    61,699.88/92,538.14 = 30,078.18/x
  3. Step 3: Cross multiply
    61,699.88x = 92,538.14 × 30,078.18
  4. Step 4: Simplify right side
    61,699.88x = 2,783,378,831.79
  5. Step 5: Solve for x
    x = 2,783,378,831.79/61,699.88
  6. Step 6: Final answer
    x = 45,111.58

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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.