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Finding the Fourth Proportional to 137,280.20, 205,920.30 and 109,632.20

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Solution

The fourth proportional to 137,280.20, 205,920.30 and 109,632.20 is: 164,448.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,280.20 : 205,920.30 = 109,632.20 : x
  2. Step 2: Convert to fraction form
    137,280.20/205,920.30 = 109,632.20/x
  3. Step 3: Cross multiply
    137,280.20x = 205,920.30 × 109,632.20
  4. Step 4: Simplify right side
    137,280.20x = 22,575,495,513.66
  5. Step 5: Solve for x
    x = 22,575,495,513.66/137,280.20
  6. Step 6: Final answer
    x = 164,448.30

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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.