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Finding the Fourth Proportional to 128,037.06, 192,086.74 and 42,647.70

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Solution

The fourth proportional to 128,037.06, 192,086.74 and 42,647.70 is: 63,981.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,037.06 : 192,086.74 = 42,647.70 : x
  2. Step 2: Convert to fraction form
    128,037.06/192,086.74 = 42,647.70/x
  3. Step 3: Cross multiply
    128,037.06x = 192,086.74 × 42,647.70
  4. Step 4: Simplify right side
    128,037.06x = 8,192,057,661.50
  5. Step 5: Solve for x
    x = 8,192,057,661.50/128,037.06
  6. Step 6: Final answer
    x = 63,981.93

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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.