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Finding the Fourth Proportional to 158,325.60, 218,489.66 and 85,728.57

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Solution

The fourth proportional to 158,325.60, 218,489.66 and 85,728.57 is: 118,305.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,325.60 : 218,489.66 = 85,728.57 : x
  2. Step 2: Convert to fraction form
    158,325.60/218,489.66 = 85,728.57/x
  3. Step 3: Cross multiply
    158,325.60x = 218,489.66 × 85,728.57
  4. Step 4: Simplify right side
    158,325.60x = 18,730,805,682.94
  5. Step 5: Solve for x
    x = 18,730,805,682.94/158,325.60
  6. Step 6: Final answer
    x = 118,305.60

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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.