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Finding the Fourth Proportional to 217,422.60, 326,117.70 and 91,030.20

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Solution

The fourth proportional to 217,422.60, 326,117.70 and 91,030.20 is: 136,538.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,422.60 : 326,117.70 = 91,030.20 : x
  2. Step 2: Convert to fraction form
    217,422.60/326,117.70 = 91,030.20/x
  3. Step 3: Cross multiply
    217,422.60x = 326,117.70 × 91,030.20
  4. Step 4: Simplify right side
    217,422.60x = 29,686,559,454.54
  5. Step 5: Solve for x
    x = 29,686,559,454.54/217,422.60
  6. Step 6: Final answer
    x = 136,538.52

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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.