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Finding the Fourth Proportional to 128,099.40, 192,182.70 and 49,216.20

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Solution

The fourth proportional to 128,099.40, 192,182.70 and 49,216.20 is: 73,837.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,099.40 : 192,182.70 = 49,216.20 : x
  2. Step 2: Convert to fraction form
    128,099.40/192,182.70 = 49,216.20/x
  3. Step 3: Cross multiply
    128,099.40x = 192,182.70 × 49,216.20
  4. Step 4: Simplify right side
    128,099.40x = 9,458,502,199.74
  5. Step 5: Solve for x
    x = 9,458,502,199.74/128,099.40
  6. Step 6: Final answer
    x = 73,837.21

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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.