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Finding the Fourth Proportional to 128,212.02, 192,336.12 and 39,472.74

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Solution

The fourth proportional to 128,212.02, 192,336.12 and 39,472.74 is: 59,214.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,212.02 : 192,336.12 = 39,472.74 : x
  2. Step 2: Convert to fraction form
    128,212.02/192,336.12 = 39,472.74/x
  3. Step 3: Cross multiply
    128,212.02x = 192,336.12 × 39,472.74
  4. Step 4: Simplify right side
    128,212.02x = 7,592,033,657.37
  5. Step 5: Solve for x
    x = 7,592,033,657.37/128,212.02
  6. Step 6: Final answer
    x = 59,214.68

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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.