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Finding the Fourth Proportional to 128,311.94, 192,455.53 and 39,541.61

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Solution

The fourth proportional to 128,311.94, 192,455.53 and 39,541.61 is: 59,308.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,311.94 : 192,455.53 = 39,541.61 : x
  2. Step 2: Convert to fraction form
    128,311.94/192,455.53 = 39,541.61/x
  3. Step 3: Cross multiply
    128,311.94x = 192,455.53 × 39,541.61
  4. Step 4: Simplify right side
    128,311.94x = 7,610,001,509.60
  5. Step 5: Solve for x
    x = 7,610,001,509.60/128,311.94
  6. Step 6: Final answer
    x = 59,308.60

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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.