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Finding the Fourth Proportional to 158,304.66, 218,460.78 and 85,708.32

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Solution

The fourth proportional to 158,304.66, 218,460.78 and 85,708.32 is: 118,277.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,304.66 : 218,460.78 = 85,708.32 : x
  2. Step 2: Convert to fraction form
    158,304.66/218,460.78 = 85,708.32/x
  3. Step 3: Cross multiply
    158,304.66x = 218,460.78 × 85,708.32
  4. Step 4: Simplify right side
    158,304.66x = 18,723,906,439.69
  5. Step 5: Solve for x
    x = 18,723,906,439.69/158,304.66
  6. Step 6: Final answer
    x = 118,277.67

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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.