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Finding the Fourth Proportional to 85,880.52, 128,814.12 and 43,734.06

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Solution

The fourth proportional to 85,880.52, 128,814.12 and 43,734.06 is: 65,597.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,880.52 : 128,814.12 = 43,734.06 : x
  2. Step 2: Convert to fraction form
    85,880.52/128,814.12 = 43,734.06/x
  3. Step 3: Cross multiply
    85,880.52x = 128,814.12 × 43,734.06
  4. Step 4: Simplify right side
    85,880.52x = 5,633,564,452.93
  5. Step 5: Solve for x
    x = 5,633,564,452.93/85,880.52
  6. Step 6: Final answer
    x = 65,597.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.