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Finding the Fourth Proportional to 85,865.39, 118,357.33 and 67,686.47

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Solution

The fourth proportional to 85,865.39, 118,357.33 and 67,686.47 is: 93,299.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,865.39 : 118,357.33 = 67,686.47 : x
  2. Step 2: Convert to fraction form
    85,865.39/118,357.33 = 67,686.47/x
  3. Step 3: Cross multiply
    85,865.39x = 118,357.33 × 67,686.47
  4. Step 4: Simplify right side
    85,865.39x = 8,011,189,636.37
  5. Step 5: Solve for x
    x = 8,011,189,636.37/85,865.39
  6. Step 6: Final answer
    x = 93,299.40

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