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Finding the Fourth Proportional to 137,340.80, 205,816.80 and 120,622.40

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Solution

The fourth proportional to 137,340.80, 205,816.80 and 120,622.40 is: 180,762.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,340.80 : 205,816.80 = 120,622.40 : x
  2. Step 2: Convert to fraction form
    137,340.80/205,816.80 = 120,622.40/x
  3. Step 3: Cross multiply
    137,340.80x = 205,816.80 × 120,622.40
  4. Step 4: Simplify right side
    137,340.80x = 24,826,116,376.32
  5. Step 5: Solve for x
    x = 24,826,116,376.32/137,340.80
  6. Step 6: Final answer
    x = 180,762.86

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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.