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Finding the Fourth Proportional to 158,313.02, 218,465.39 and 86,691.80

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Solution

The fourth proportional to 158,313.02, 218,465.39 and 86,691.80 is: 119,631.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,313.02 : 218,465.39 = 86,691.80 : x
  2. Step 2: Convert to fraction form
    158,313.02/218,465.39 = 86,691.80/x
  3. Step 3: Cross multiply
    158,313.02x = 218,465.39 × 86,691.80
  4. Step 4: Simplify right side
    158,313.02x = 18,939,157,896.80
  5. Step 5: Solve for x
    x = 18,939,157,896.80/158,313.02
  6. Step 6: Final answer
    x = 119,631.09

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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.