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Finding the Fourth Proportional to 210,773.81, 316,126.08 and 90,798.21

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Solution

The fourth proportional to 210,773.81, 316,126.08 and 90,798.21 is: 136,182.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,773.81 : 316,126.08 = 90,798.21 : x
  2. Step 2: Convert to fraction form
    210,773.81/316,126.08 = 90,798.21/x
  3. Step 3: Cross multiply
    210,773.81x = 316,126.08 × 90,798.21
  4. Step 4: Simplify right side
    210,773.81x = 28,703,682,198.32
  5. Step 5: Solve for x
    x = 28,703,682,198.32/210,773.81
  6. Step 6: Final answer
    x = 136,182.39

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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.