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Finding the Fourth Proportional to 210,858.96, 291,105.66 and 139,446.12

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Solution

The fourth proportional to 210,858.96, 291,105.66 and 139,446.12 is: 192,515.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,858.96 : 291,105.66 = 139,446.12 : x
  2. Step 2: Convert to fraction form
    210,858.96/291,105.66 = 139,446.12/x
  3. Step 3: Cross multiply
    210,858.96x = 291,105.66 × 139,446.12
  4. Step 4: Simplify right side
    210,858.96x = 40,593,554,797.04
  5. Step 5: Solve for x
    x = 40,593,554,797.04/210,858.96
  6. Step 6: Final answer
    x = 192,515.20

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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.