Home / 91,155.16-136,731.93-31,976.97

Finding the Fourth Proportional to 91,155.16, 136,731.93 and 31,976.97

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Solution

The fourth proportional to 91,155.16, 136,731.93 and 31,976.97 is: 47,965.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,155.16 : 136,731.93 = 31,976.97 : x
  2. Step 2: Convert to fraction form
    91,155.16/136,731.93 = 31,976.97/x
  3. Step 3: Cross multiply
    91,155.16x = 136,731.93 × 31,976.97
  4. Step 4: Simplify right side
    91,155.16x = 4,372,272,139.99
  5. Step 5: Solve for x
    x = 4,372,272,139.99/91,155.16
  6. Step 6: Final answer
    x = 47,965.16

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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.