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Finding the Fourth Proportional to 219,243.60, 328,956.12 and 79,016.40

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Solution

The fourth proportional to 219,243.60, 328,956.12 and 79,016.40 is: 118,557.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,243.60 : 328,956.12 = 79,016.40 : x
  2. Step 2: Convert to fraction form
    219,243.60/328,956.12 = 79,016.40/x
  3. Step 3: Cross multiply
    219,243.60x = 328,956.12 × 79,016.40
  4. Step 4: Simplify right side
    219,243.60x = 25,992,928,360.37
  5. Step 5: Solve for x
    x = 25,992,928,360.37/219,243.60
  6. Step 6: Final answer
    x = 118,557.30

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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.