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Finding the Fourth Proportional to 86,105.68, 118,784.46 and 74,148.26

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Solution

The fourth proportional to 86,105.68, 118,784.46 and 74,148.26 is: 102,288.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,105.68 : 118,784.46 = 74,148.26 : x
  2. Step 2: Convert to fraction form
    86,105.68/118,784.46 = 74,148.26/x
  3. Step 3: Cross multiply
    86,105.68x = 118,784.46 × 74,148.26
  4. Step 4: Simplify right side
    86,105.68x = 8,807,660,059.38
  5. Step 5: Solve for x
    x = 8,807,660,059.38/86,105.68
  6. Step 6: Final answer
    x = 102,288.96

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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.