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Finding the Fourth Proportional to 128,046.10, 192,069.15 and 121,485.10

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Solution

The fourth proportional to 128,046.10, 192,069.15 and 121,485.10 is: 182,227.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,046.10 : 192,069.15 = 121,485.10 : x
  2. Step 2: Convert to fraction form
    128,046.10/192,069.15 = 121,485.10/x
  3. Step 3: Cross multiply
    128,046.10x = 192,069.15 × 121,485.10
  4. Step 4: Simplify right side
    128,046.10x = 23,333,539,894.67
  5. Step 5: Solve for x
    x = 23,333,539,894.67/128,046.10
  6. Step 6: Final answer
    x = 182,227.65

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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.