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Finding the Fourth Proportional to 219,605.58, 329,487.39 and 86,412.06

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Solution

The fourth proportional to 219,605.58, 329,487.39 and 86,412.06 is: 129,649.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,605.58 : 329,487.39 = 86,412.06 : x
  2. Step 2: Convert to fraction form
    219,605.58/329,487.39 = 86,412.06/x
  3. Step 3: Cross multiply
    219,605.58x = 329,487.39 × 86,412.06
  4. Step 4: Simplify right side
    219,605.58x = 28,471,684,113.92
  5. Step 5: Solve for x
    x = 28,471,684,113.92/219,605.58
  6. Step 6: Final answer
    x = 129,649.18

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1.5x scale

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.