Home / 210,790.12-316,185.72-86,131.12

Finding the Fourth Proportional to 210,790.12, 316,185.72 and 86,131.12

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Solution

The fourth proportional to 210,790.12, 316,185.72 and 86,131.12 is: 129,196.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,790.12 : 316,185.72 = 86,131.12 : x
  2. Step 2: Convert to fraction form
    210,790.12/316,185.72 = 86,131.12/x
  3. Step 3: Cross multiply
    210,790.12x = 316,185.72 × 86,131.12
  4. Step 4: Simplify right side
    210,790.12x = 27,233,430,191.61
  5. Step 5: Solve for x
    x = 27,233,430,191.61/210,790.12
  6. Step 6: Final answer
    x = 129,196.90

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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.