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Finding the Fourth Proportional to 210,999.45, 316,449.49 and 61,200.21

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Solution

The fourth proportional to 210,999.45, 316,449.49 and 61,200.21 is: 91,785.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,999.45 : 316,449.49 = 61,200.21 : x
  2. Step 2: Convert to fraction form
    210,999.45/316,449.49 = 61,200.21/x
  3. Step 3: Cross multiply
    210,999.45x = 316,449.49 × 61,200.21
  4. Step 4: Simplify right side
    210,999.45x = 19,366,775,242.39
  5. Step 5: Solve for x
    x = 19,366,775,242.39/210,999.45
  6. Step 6: Final answer
    x = 91,785.90

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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.