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Finding the Fourth Proportional to 199,875.70, 299,690.53 and 66,720.21

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Solution

The fourth proportional to 199,875.70, 299,690.53 and 66,720.21 is: 100,039.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,875.70 : 299,690.53 = 66,720.21 : x
  2. Step 2: Convert to fraction form
    199,875.70/299,690.53 = 66,720.21/x
  3. Step 3: Cross multiply
    199,875.70x = 299,690.53 × 66,720.21
  4. Step 4: Simplify right side
    199,875.70x = 19,995,414,056.17
  5. Step 5: Solve for x
    x = 19,995,414,056.17/199,875.70
  6. Step 6: Final answer
    x = 100,039.24

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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.