Home / 128,039.06-192,089.74-42,649.70

Finding the Fourth Proportional to 128,039.06, 192,089.74 and 42,649.70

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Solution

The fourth proportional to 128,039.06, 192,089.74 and 42,649.70 is: 63,984.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,039.06 : 192,089.74 = 42,649.70 : x
  2. Step 2: Convert to fraction form
    128,039.06/192,089.74 = 42,649.70/x
  3. Step 3: Cross multiply
    128,039.06x = 192,089.74 × 42,649.70
  4. Step 4: Simplify right side
    128,039.06x = 8,192,569,784.08
  5. Step 5: Solve for x
    x = 8,192,569,784.08/128,039.06
  6. Step 6: Final answer
    x = 63,984.93

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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.