Home / 80,966.40-121,413.15-31,029.90

Finding the Fourth Proportional to 80,966.40, 121,413.15 and 31,029.90

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Solution

The fourth proportional to 80,966.40, 121,413.15 and 31,029.90 is: 46,530.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,966.40 : 121,413.15 = 31,029.90 : x
  2. Step 2: Convert to fraction form
    80,966.40/121,413.15 = 31,029.90/x
  3. Step 3: Cross multiply
    80,966.40x = 121,413.15 × 31,029.90
  4. Step 4: Simplify right side
    80,966.40x = 3,767,437,903.19
  5. Step 5: Solve for x
    x = 3,767,437,903.19/80,966.40
  6. Step 6: Final answer
    x = 46,530.88

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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.