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Finding the Fourth Proportional to 128,384.39, 192,622.16 and 57,300.56

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Solution

The fourth proportional to 128,384.39, 192,622.16 and 57,300.56 is: 85,971.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,384.39 : 192,622.16 = 57,300.56 : x
  2. Step 2: Convert to fraction form
    128,384.39/192,622.16 = 57,300.56/x
  3. Step 3: Cross multiply
    128,384.39x = 192,622.16 × 57,300.56
  4. Step 4: Simplify right side
    128,384.39x = 11,037,356,816.55
  5. Step 5: Solve for x
    x = 11,037,356,816.55/128,384.39
  6. Step 6: Final answer
    x = 85,971.18

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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.