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Finding the Fourth Proportional to 128,417.76, 192,704.40 and 49,586.40

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Solution

The fourth proportional to 128,417.76, 192,704.40 and 49,586.40 is: 74,409.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,417.76 : 192,704.40 = 49,586.40 : x
  2. Step 2: Convert to fraction form
    128,417.76/192,704.40 = 49,586.40/x
  3. Step 3: Cross multiply
    128,417.76x = 192,704.40 × 49,586.40
  4. Step 4: Simplify right side
    128,417.76x = 9,555,517,460.16
  5. Step 5: Solve for x
    x = 9,555,517,460.16/128,417.76
  6. Step 6: Final answer
    x = 74,409.63

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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.