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Finding the Fourth Proportional to 137,336.80, 205,810.80 and 120,618.40

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Solution

The fourth proportional to 137,336.80, 205,810.80 and 120,618.40 is: 180,756.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,336.80 : 205,810.80 = 120,618.40 : x
  2. Step 2: Convert to fraction form
    137,336.80/205,810.80 = 120,618.40/x
  3. Step 3: Cross multiply
    137,336.80x = 205,810.80 × 120,618.40
  4. Step 4: Simplify right side
    137,336.80x = 24,824,569,398.72
  5. Step 5: Solve for x
    x = 24,824,569,398.72/137,336.80
  6. Step 6: Final answer
    x = 180,756.86

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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.