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Finding the Fourth Proportional to 128,013.60, 191,858.40 and 49,022.40

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Solution

The fourth proportional to 128,013.60, 191,858.40 and 49,022.40 is: 73,471.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,013.60 : 191,858.40 = 49,022.40 : x
  2. Step 2: Convert to fraction form
    128,013.60/191,858.40 = 49,022.40/x
  3. Step 3: Cross multiply
    128,013.60x = 191,858.40 × 49,022.40
  4. Step 4: Simplify right side
    128,013.60x = 9,405,359,228.16
  5. Step 5: Solve for x
    x = 9,405,359,228.16/128,013.60
  6. Step 6: Final answer
    x = 73,471.56

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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.