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Finding the Fourth Proportional to 128,311.93, 192,455.51 and 39,541.60

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Solution

The fourth proportional to 128,311.93, 192,455.51 and 39,541.60 is: 59,308.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,311.93 : 192,455.51 = 39,541.60 : x
  2. Step 2: Convert to fraction form
    128,311.93/192,455.51 = 39,541.60/x
  3. Step 3: Cross multiply
    128,311.93x = 192,455.51 × 39,541.60
  4. Step 4: Simplify right side
    128,311.93x = 7,609,998,794.22
  5. Step 5: Solve for x
    x = 7,609,998,794.22/128,311.93
  6. Step 6: Final answer
    x = 59,308.58

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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.