Home / 91,020.64-136,530.94-28,691.12

Finding the Fourth Proportional to 91,020.64, 136,530.94 and 28,691.12

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Solution

The fourth proportional to 91,020.64, 136,530.94 and 28,691.12 is: 43,036.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,020.64 : 136,530.94 = 28,691.12 : x
  2. Step 2: Convert to fraction form
    91,020.64/136,530.94 = 28,691.12/x
  3. Step 3: Cross multiply
    91,020.64x = 136,530.94 × 28,691.12
  4. Step 4: Simplify right side
    91,020.64x = 3,917,225,583.25
  5. Step 5: Solve for x
    x = 3,917,225,583.25/91,020.64
  6. Step 6: Final answer
    x = 43,036.67

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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.