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Finding the Fourth Proportional to 235,538.14, 353,093.39 and 85,672.48

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Solution

The fourth proportional to 235,538.14, 353,093.39 and 85,672.48 is: 128,430.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,538.14 : 353,093.39 = 85,672.48 : x
  2. Step 2: Convert to fraction form
    235,538.14/353,093.39 = 85,672.48/x
  3. Step 3: Cross multiply
    235,538.14x = 353,093.39 × 85,672.48
  4. Step 4: Simplify right side
    235,538.14x = 30,250,386,547.04
  5. Step 5: Solve for x
    x = 30,250,386,547.04/235,538.14
  6. Step 6: Final answer
    x = 128,430.95

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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.