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Finding the Fourth Proportional to 135,292.76, 186,723.71 and 77,920.91

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Solution

The fourth proportional to 135,292.76, 186,723.71 and 77,920.91 is: 107,542.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,292.76 : 186,723.71 = 77,920.91 : x
  2. Step 2: Convert to fraction form
    135,292.76/186,723.71 = 77,920.91/x
  3. Step 3: Cross multiply
    135,292.76x = 186,723.71 × 77,920.91
  4. Step 4: Simplify right side
    135,292.76x = 14,549,682,413.49
  5. Step 5: Solve for x
    x = 14,549,682,413.49/135,292.76
  6. Step 6: Final answer
    x = 107,542.21

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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.