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Finding the Fourth Proportional to 158,315.85, 218,474.31 and 85,718.39

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Solution

The fourth proportional to 158,315.85, 218,474.31 and 85,718.39 is: 118,290.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,315.85 : 218,474.31 = 85,718.39 : x
  2. Step 2: Convert to fraction form
    158,315.85/218,474.31 = 85,718.39/x
  3. Step 3: Cross multiply
    158,315.85x = 218,474.31 × 85,718.39
  4. Step 4: Simplify right side
    158,315.85x = 18,727,265,338.63
  5. Step 5: Solve for x
    x = 18,727,265,338.63/158,315.85
  6. Step 6: Final answer
    x = 118,290.53

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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.