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Finding the Fourth Proportional to 235,685.97, 325,281.68 and 138,858.87

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Solution

The fourth proportional to 235,685.97, 325,281.68 and 138,858.87 is: 191,645.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,685.97 : 325,281.68 = 138,858.87 : x
  2. Step 2: Convert to fraction form
    235,685.97/325,281.68 = 138,858.87/x
  3. Step 3: Cross multiply
    235,685.97x = 325,281.68 × 138,858.87
  4. Step 4: Simplify right side
    235,685.97x = 45,168,246,516.50
  5. Step 5: Solve for x
    x = 45,168,246,516.50/235,685.97
  6. Step 6: Final answer
    x = 191,645.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.