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Finding the Fourth Proportional to 210,801.12, 316,202.22 and 86,142.12

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Solution

The fourth proportional to 210,801.12, 316,202.22 and 86,142.12 is: 129,213.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,801.12 : 316,202.22 = 86,142.12 : x
  2. Step 2: Convert to fraction form
    210,801.12/316,202.22 = 86,142.12/x
  3. Step 3: Cross multiply
    210,801.12x = 316,202.22 × 86,142.12
  4. Step 4: Simplify right side
    210,801.12x = 27,238,329,579.51
  5. Step 5: Solve for x
    x = 27,238,329,579.51/210,801.12
  6. Step 6: Final answer
    x = 129,213.40

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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.