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Finding the Fourth Proportional to 128,498.40, 192,749.67 and 39,750.93

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Solution

The fourth proportional to 128,498.40, 192,749.67 and 39,750.93 is: 59,627.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,498.40 : 192,749.67 = 39,750.93 : x
  2. Step 2: Convert to fraction form
    128,498.40/192,749.67 = 39,750.93/x
  3. Step 3: Cross multiply
    128,498.40x = 192,749.67 × 39,750.93
  4. Step 4: Simplify right side
    128,498.40x = 7,661,978,639.69
  5. Step 5: Solve for x
    x = 7,661,978,639.69/128,498.40
  6. Step 6: Final answer
    x = 59,627.04

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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.