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Finding the Fourth Proportional to 128,147.30, 192,148.96 and 53,217.03

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Solution

The fourth proportional to 128,147.30, 192,148.96 and 53,217.03 is: 79,795.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,147.30 : 192,148.96 = 53,217.03 : x
  2. Step 2: Convert to fraction form
    128,147.30/192,148.96 = 53,217.03/x
  3. Step 3: Cross multiply
    128,147.30x = 192,148.96 × 53,217.03
  4. Step 4: Simplify right side
    128,147.30x = 10,225,596,968.79
  5. Step 5: Solve for x
    x = 10,225,596,968.79/128,147.30
  6. Step 6: Final answer
    x = 79,795.65

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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.