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Finding the Fourth Proportional to 130,482.69, 180,152.85 and 100,213.92

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Solution

The fourth proportional to 130,482.69, 180,152.85 and 100,213.92 is: 138,361.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,482.69 : 180,152.85 = 100,213.92 : x
  2. Step 2: Convert to fraction form
    130,482.69/180,152.85 = 100,213.92/x
  3. Step 3: Cross multiply
    130,482.69x = 180,152.85 × 100,213.92
  4. Step 4: Simplify right side
    130,482.69x = 18,053,823,297.67
  5. Step 5: Solve for x
    x = 18,053,823,297.67/130,482.69
  6. Step 6: Final answer
    x = 138,361.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.