Home / 128,046.12-192,061.90-39,299.50

Finding the Fourth Proportional to 128,046.12, 192,061.90 and 39,299.50

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Solution

The fourth proportional to 128,046.12, 192,061.90 and 39,299.50 is: 58,947.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,046.12 : 192,061.90 = 39,299.50 : x
  2. Step 2: Convert to fraction form
    128,046.12/192,061.90 = 39,299.50/x
  3. Step 3: Cross multiply
    128,046.12x = 192,061.90 × 39,299.50
  4. Step 4: Simplify right side
    128,046.12x = 7,547,936,639.05
  5. Step 5: Solve for x
    x = 7,547,936,639.05/128,046.12
  6. Step 6: Final answer
    x = 58,947.02

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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.