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Finding the Fourth Proportional to 128,482.53, 192,722.71 and 100,426.19

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Solution

The fourth proportional to 128,482.53, 192,722.71 and 100,426.19 is: 150,638.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,482.53 : 192,722.71 = 100,426.19 : x
  2. Step 2: Convert to fraction form
    128,482.53/192,722.71 = 100,426.19/x
  3. Step 3: Cross multiply
    128,482.53x = 192,722.71 × 100,426.19
  4. Step 4: Simplify right side
    128,482.53x = 19,354,407,491.77
  5. Step 5: Solve for x
    x = 19,354,407,491.77/128,482.53
  6. Step 6: Final answer
    x = 150,638.44

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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.