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Finding the Fourth Proportional to 143,412.68, 197,873.34 and 86,813.12

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Solution

The fourth proportional to 143,412.68, 197,873.34 and 86,813.12 is: 119,780.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,412.68 : 197,873.34 = 86,813.12 : x
  2. Step 2: Convert to fraction form
    143,412.68/197,873.34 = 86,813.12/x
  3. Step 3: Cross multiply
    143,412.68x = 197,873.34 × 86,813.12
  4. Step 4: Simplify right side
    143,412.68x = 17,178,002,010.22
  5. Step 5: Solve for x
    x = 17,178,002,010.22/143,412.68
  6. Step 6: Final answer
    x = 119,780.22

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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.