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Finding the Fourth Proportional to 139,910.76, 193,079.04 and 76,248.48

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Solution

The fourth proportional to 139,910.76, 193,079.04 and 76,248.48 is: 105,224.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,910.76 : 193,079.04 = 76,248.48 : x
  2. Step 2: Convert to fraction form
    139,910.76/193,079.04 = 76,248.48/x
  3. Step 3: Cross multiply
    139,910.76x = 193,079.04 × 76,248.48
  4. Step 4: Simplify right side
    139,910.76x = 14,721,983,319.86
  5. Step 5: Solve for x
    x = 14,721,983,319.86/139,910.76
  6. Step 6: Final answer
    x = 105,224.10

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.