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Finding the Fourth Proportional to 128,458.62, 192,555.48 and 53,622.30

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Solution

The fourth proportional to 128,458.62, 192,555.48 and 53,622.30 is: 80,378.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,458.62 : 192,555.48 = 53,622.30 : x
  2. Step 2: Convert to fraction form
    128,458.62/192,555.48 = 53,622.30/x
  3. Step 3: Cross multiply
    128,458.62x = 192,555.48 × 53,622.30
  4. Step 4: Simplify right side
    128,458.62x = 10,325,267,715.20
  5. Step 5: Solve for x
    x = 10,325,267,715.20/128,458.62
  6. Step 6: Final answer
    x = 80,378.16

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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.