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Finding the Fourth Proportional to 219,712.40, 329,549.40 and 71,968.40

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Solution

The fourth proportional to 219,712.40, 329,549.40 and 71,968.40 is: 107,946.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,712.40 : 329,549.40 = 71,968.40 : x
  2. Step 2: Convert to fraction form
    219,712.40/329,549.40 = 71,968.40/x
  3. Step 3: Cross multiply
    219,712.40x = 329,549.40 × 71,968.40
  4. Step 4: Simplify right side
    219,712.40x = 23,717,143,038.96
  5. Step 5: Solve for x
    x = 23,717,143,038.96/219,712.40
  6. Step 6: Final answer
    x = 107,946.31

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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.