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Finding the Fourth Proportional to 211,506, 291,889.80 and 122,110.80

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Solution

The fourth proportional to 211,506, 291,889.80 and 122,110.80 is: 168,519.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,506 : 291,889.80 = 122,110.80 : x
  2. Step 2: Convert to fraction form
    211,506/291,889.80 = 122,110.80/x
  3. Step 3: Cross multiply
    211,506x = 291,889.80 × 122,110.80
  4. Step 4: Simplify right side
    211,506x = 35,642,896,989.84
  5. Step 5: Solve for x
    x = 35,642,896,989.84/211,506
  6. Step 6: Final answer
    x = 168,519.55

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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.