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Finding the Fourth Proportional to 139,842.68, 210,818.20 and 130,822.52

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Solution

The fourth proportional to 139,842.68, 210,818.20 and 130,822.52 is: 197,219.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,842.68 : 210,818.20 = 130,822.52 : x
  2. Step 2: Convert to fraction form
    139,842.68/210,818.20 = 130,822.52/x
  3. Step 3: Cross multiply
    139,842.68x = 210,818.20 × 130,822.52
  4. Step 4: Simplify right side
    139,842.68x = 27,579,768,185.86
  5. Step 5: Solve for x
    x = 27,579,768,185.86/139,842.68
  6. Step 6: Final answer
    x = 197,219.96

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.