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Finding the Fourth Proportional to 128,338.67, 192,521.21 and 48,443.93

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Solution

The fourth proportional to 128,338.67, 192,521.21 and 48,443.93 is: 72,670.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,338.67 : 192,521.21 = 48,443.93 : x
  2. Step 2: Convert to fraction form
    128,338.67/192,521.21 = 48,443.93/x
  3. Step 3: Cross multiply
    128,338.67x = 192,521.21 × 48,443.93
  4. Step 4: Simplify right side
    128,338.67x = 9,326,484,259.84
  5. Step 5: Solve for x
    x = 9,326,484,259.84/128,338.67
  6. Step 6: Final answer
    x = 72,670.88

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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.