Home / 128,315.14-192,368.72-53,491.39

Finding the Fourth Proportional to 128,315.14, 192,368.72 and 53,491.39

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Solution

The fourth proportional to 128,315.14, 192,368.72 and 53,491.39 is: 80,193.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,315.14 : 192,368.72 = 53,491.39 : x
  2. Step 2: Convert to fraction form
    128,315.14/192,368.72 = 53,491.39/x
  3. Step 3: Cross multiply
    128,315.14x = 192,368.72 × 53,491.39
  4. Step 4: Simplify right side
    128,315.14x = 10,290,069,878.13
  5. Step 5: Solve for x
    x = 10,290,069,878.13/128,315.14
  6. Step 6: Final answer
    x = 80,193.73

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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.