Home / 90,942.12-136,413.66-31,777.56

Finding the Fourth Proportional to 90,942.12, 136,413.66 and 31,777.56

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Solution

The fourth proportional to 90,942.12, 136,413.66 and 31,777.56 is: 47,666.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,942.12 : 136,413.66 = 31,777.56 : x
  2. Step 2: Convert to fraction form
    90,942.12/136,413.66 = 31,777.56/x
  3. Step 3: Cross multiply
    90,942.12x = 136,413.66 × 31,777.56
  4. Step 4: Simplify right side
    90,942.12x = 4,334,893,265.47
  5. Step 5: Solve for x
    x = 4,334,893,265.47/90,942.12
  6. Step 6: Final answer
    x = 47,666.51

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1.5x scale

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.