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Finding the Fourth Proportional to 128,904.48, 193,367.10 and 48,980.72

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Solution

The fourth proportional to 128,904.48, 193,367.10 and 48,980.72 is: 73,475.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,904.48 : 193,367.10 = 48,980.72 : x
  2. Step 2: Convert to fraction form
    128,904.48/193,367.10 = 48,980.72/x
  3. Step 3: Cross multiply
    128,904.48x = 193,367.10 × 48,980.72
  4. Step 4: Simplify right side
    128,904.48x = 9,471,259,086.20
  5. Step 5: Solve for x
    x = 9,471,259,086.20/128,904.48
  6. Step 6: Final answer
    x = 73,475.02

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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.