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Finding the Fourth Proportional to 92,413.12, 137,951.12 and 81,203.08

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Solution

The fourth proportional to 92,413.12, 137,951.12 and 81,203.08 is: 121,217.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,413.12 : 137,951.12 = 81,203.08 : x
  2. Step 2: Convert to fraction form
    92,413.12/137,951.12 = 81,203.08/x
  3. Step 3: Cross multiply
    92,413.12x = 137,951.12 × 81,203.08
  4. Step 4: Simplify right side
    92,413.12x = 11,202,055,833.45
  5. Step 5: Solve for x
    x = 11,202,055,833.45/92,413.12
  6. Step 6: Final answer
    x = 121,217.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.