Home / 91,046.36-136,569.60-28,721.72

Finding the Fourth Proportional to 91,046.36, 136,569.60 and 28,721.72

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Solution

The fourth proportional to 91,046.36, 136,569.60 and 28,721.72 is: 43,082.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,046.36 : 136,569.60 = 28,721.72 : x
  2. Step 2: Convert to fraction form
    91,046.36/136,569.60 = 28,721.72/x
  3. Step 3: Cross multiply
    91,046.36x = 136,569.60 × 28,721.72
  4. Step 4: Simplify right side
    91,046.36x = 3,922,513,811.71
  5. Step 5: Solve for x
    x = 3,922,513,811.71/91,046.36
  6. Step 6: Final answer
    x = 43,082.60

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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.