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Finding the Fourth Proportional to 128,483.13, 192,723.59 and 100,426.76

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Solution

The fourth proportional to 128,483.13, 192,723.59 and 100,426.76 is: 150,639.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,483.13 : 192,723.59 = 100,426.76 : x
  2. Step 2: Convert to fraction form
    128,483.13/192,723.59 = 100,426.76/x
  3. Step 3: Cross multiply
    128,483.13x = 192,723.59 × 100,426.76
  4. Step 4: Simplify right side
    128,483.13x = 19,354,605,164.53
  5. Step 5: Solve for x
    x = 19,354,605,164.53/128,483.13
  6. Step 6: Final answer
    x = 150,639.27

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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.