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Finding the Fourth Proportional to 86,435.56, 119,221.86 and 52,918.12

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Solution

The fourth proportional to 86,435.56, 119,221.86 and 52,918.12 is: 72,990.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,435.56 : 119,221.86 = 52,918.12 : x
  2. Step 2: Convert to fraction form
    86,435.56/119,221.86 = 52,918.12/x
  3. Step 3: Cross multiply
    86,435.56x = 119,221.86 × 52,918.12
  4. Step 4: Simplify right side
    86,435.56x = 6,308,996,694.10
  5. Step 5: Solve for x
    x = 6,308,996,694.10/86,435.56
  6. Step 6: Final answer
    x = 72,990.75

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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.