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Finding the Fourth Proportional to 128,436.90, 192,655.35 and 33,666.90

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Solution

The fourth proportional to 128,436.90, 192,655.35 and 33,666.90 is: 50,500.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,436.90 : 192,655.35 = 33,666.90 : x
  2. Step 2: Convert to fraction form
    128,436.90/192,655.35 = 33,666.90/x
  3. Step 3: Cross multiply
    128,436.90x = 192,655.35 × 33,666.90
  4. Step 4: Simplify right side
    128,436.90x = 6,486,108,402.92
  5. Step 5: Solve for x
    x = 6,486,108,402.92/128,436.90
  6. Step 6: Final answer
    x = 50,500.35

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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.