Home / 219,138.36-328,756.80-69,387.60

Finding the Fourth Proportional to 219,138.36, 328,756.80 and 69,387.60

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Solution

The fourth proportional to 219,138.36, 328,756.80 and 69,387.60 is: 104,097.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,138.36 : 328,756.80 = 69,387.60 : x
  2. Step 2: Convert to fraction form
    219,138.36/328,756.80 = 69,387.60/x
  3. Step 3: Cross multiply
    219,138.36x = 328,756.80 × 69,387.60
  4. Step 4: Simplify right side
    219,138.36x = 22,811,645,335.68
  5. Step 5: Solve for x
    x = 22,811,645,335.68/219,138.36
  6. Step 6: Final answer
    x = 104,097.00

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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.