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Finding the Fourth Proportional to 219,246.40, 328,869.60 and 79,009.60

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Solution

The fourth proportional to 219,246.40, 328,869.60 and 79,009.60 is: 118,514.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,246.40 : 328,869.60 = 79,009.60 : x
  2. Step 2: Convert to fraction form
    219,246.40/328,869.60 = 79,009.60/x
  3. Step 3: Cross multiply
    219,246.40x = 328,869.60 × 79,009.60
  4. Step 4: Simplify right side
    219,246.40x = 25,983,855,548.16
  5. Step 5: Solve for x
    x = 25,983,855,548.16/219,246.40
  6. Step 6: Final answer
    x = 118,514.40

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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.