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Finding the Fourth Proportional to 128,397.70, 192,492.20 and 53,573.58

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Solution

The fourth proportional to 128,397.70, 192,492.20 and 53,573.58 is: 80,316.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,397.70 : 192,492.20 = 53,573.58 : x
  2. Step 2: Convert to fraction form
    128,397.70/192,492.20 = 53,573.58/x
  3. Step 3: Cross multiply
    128,397.70x = 192,492.20 × 53,573.58
  4. Step 4: Simplify right side
    128,397.70x = 10,312,496,276.08
  5. Step 5: Solve for x
    x = 10,312,496,276.08/128,397.70
  6. Step 6: Final answer
    x = 80,316.83

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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.