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Finding the Fourth Proportional to 90,813.74, 125,271.15 and 54,505.49

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Solution

The fourth proportional to 90,813.74, 125,271.15 and 54,505.49 is: 75,186.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,813.74 : 125,271.15 = 54,505.49 : x
  2. Step 2: Convert to fraction form
    90,813.74/125,271.15 = 54,505.49/x
  3. Step 3: Cross multiply
    90,813.74x = 125,271.15 × 54,505.49
  4. Step 4: Simplify right side
    90,813.74x = 6,827,965,413.61
  5. Step 5: Solve for x
    x = 6,827,965,413.61/90,813.74
  6. Step 6: Final answer
    x = 75,186.48

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1.5x scale

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.