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Finding the Fourth Proportional to 128,597.12, 192,894.24 and 45,471.68

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Solution

The fourth proportional to 128,597.12, 192,894.24 and 45,471.68 is: 68,207.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,597.12 : 192,894.24 = 45,471.68 : x
  2. Step 2: Convert to fraction form
    128,597.12/192,894.24 = 45,471.68/x
  3. Step 3: Cross multiply
    128,597.12x = 192,894.24 × 45,471.68
  4. Step 4: Simplify right side
    128,597.12x = 8,771,225,155.12
  5. Step 5: Solve for x
    x = 8,771,225,155.12/128,597.12
  6. Step 6: Final answer
    x = 68,207.01

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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.