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Finding the Fourth Proportional to 158,286.67, 218,435.56 and 86,666.67

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Solution

The fourth proportional to 158,286.67, 218,435.56 and 86,666.67 is: 119,599.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,286.67 : 218,435.56 = 86,666.67 : x
  2. Step 2: Convert to fraction form
    158,286.67/218,435.56 = 86,666.67/x
  3. Step 3: Cross multiply
    158,286.67x = 218,435.56 × 86,666.67
  4. Step 4: Simplify right side
    158,286.67x = 18,931,082,378.12
  5. Step 5: Solve for x
    x = 18,931,082,378.12/158,286.67
  6. Step 6: Final answer
    x = 119,599.98

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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.