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Finding the Fourth Proportional to 128,710.60, 193,073.24 and 43,287.16

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Solution

The fourth proportional to 128,710.60, 193,073.24 and 43,287.16 is: 64,933.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,710.60 : 193,073.24 = 43,287.16 : x
  2. Step 2: Convert to fraction form
    128,710.60/193,073.24 = 43,287.16/x
  3. Step 3: Cross multiply
    128,710.60x = 193,073.24 × 43,287.16
  4. Step 4: Simplify right side
    128,710.60x = 8,357,592,231.60
  5. Step 5: Solve for x
    x = 8,357,592,231.60/128,710.60
  6. Step 6: Final answer
    x = 64,933.21

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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.