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Finding the Fourth Proportional to 188,454.87, 260,128.32 and 120,654.45

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Solution

The fourth proportional to 188,454.87, 260,128.32 and 120,654.45 is: 166,541.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,454.87 : 260,128.32 = 120,654.45 : x
  2. Step 2: Convert to fraction form
    188,454.87/260,128.32 = 120,654.45/x
  3. Step 3: Cross multiply
    188,454.87x = 260,128.32 × 120,654.45
  4. Step 4: Simplify right side
    188,454.87x = 31,385,639,379.02
  5. Step 5: Solve for x
    x = 31,385,639,379.02/188,454.87
  6. Step 6: Final answer
    x = 166,541.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.