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Finding the Fourth Proportional to 111,155.69, 153,394.44 and 63,408.95

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Solution

The fourth proportional to 111,155.69, 153,394.44 and 63,408.95 is: 87,504.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,155.69 : 153,394.44 = 63,408.95 : x
  2. Step 2: Convert to fraction form
    111,155.69/153,394.44 = 63,408.95/x
  3. Step 3: Cross multiply
    111,155.69x = 153,394.44 × 63,408.95
  4. Step 4: Simplify right side
    111,155.69x = 9,726,580,376.24
  5. Step 5: Solve for x
    x = 9,726,580,376.24/111,155.69
  6. Step 6: Final answer
    x = 87,504.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.