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Finding the Fourth Proportional to 140,339.58, 210,561.75 and 84,219.95

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Solution

The fourth proportional to 140,339.58, 210,561.75 and 84,219.95 is: 126,361.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,339.58 : 210,561.75 = 84,219.95 : x
  2. Step 2: Convert to fraction form
    140,339.58/210,561.75 = 84,219.95/x
  3. Step 3: Cross multiply
    140,339.58x = 210,561.75 × 84,219.95
  4. Step 4: Simplify right side
    140,339.58x = 17,733,499,004.10
  5. Step 5: Solve for x
    x = 17,733,499,004.10/140,339.58
  6. Step 6: Final answer
    x = 126,361.35

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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.