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Finding the Fourth Proportional to 128,956.40, 192,491.44 and 119,458.34

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Solution

The fourth proportional to 128,956.40, 192,491.44 and 119,458.34 is: 178,313.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,956.40 : 192,491.44 = 119,458.34 : x
  2. Step 2: Convert to fraction form
    128,956.40/192,491.44 = 119,458.34/x
  3. Step 3: Cross multiply
    128,956.40x = 192,491.44 × 119,458.34
  4. Step 4: Simplify right side
    128,956.40x = 22,994,707,886.61
  5. Step 5: Solve for x
    x = 22,994,707,886.61/128,956.40
  6. Step 6: Final answer
    x = 178,313.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.