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Finding the Fourth Proportional to 219,851.40, 329,712.30 and 86,687.40

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Solution

The fourth proportional to 219,851.40, 329,712.30 and 86,687.40 is: 130,005.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,851.40 : 329,712.30 = 86,687.40 : x
  2. Step 2: Convert to fraction form
    219,851.40/329,712.30 = 86,687.40/x
  3. Step 3: Cross multiply
    219,851.40x = 329,712.30 × 86,687.40
  4. Step 4: Simplify right side
    219,851.40x = 28,581,902,035.02
  5. Step 5: Solve for x
    x = 28,581,902,035.02/219,851.40
  6. Step 6: Final answer
    x = 130,005.55

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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.