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Finding the Fourth Proportional to 211,017.55, 291,204.29 and 115,530.29

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Solution

The fourth proportional to 211,017.55, 291,204.29 and 115,530.29 is: 159,431.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,017.55 : 291,204.29 = 115,530.29 : x
  2. Step 2: Convert to fraction form
    211,017.55/291,204.29 = 115,530.29/x
  3. Step 3: Cross multiply
    211,017.55x = 291,204.29 × 115,530.29
  4. Step 4: Simplify right side
    211,017.55x = 33,642,916,072.94
  5. Step 5: Solve for x
    x = 33,642,916,072.94/211,017.55
  6. Step 6: Final answer
    x = 159,431.84

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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.