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Finding the Fourth Proportional to 178,993.74, 247,013.04 and 98,421.78

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Solution

The fourth proportional to 178,993.74, 247,013.04 and 98,421.78 is: 135,822.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,993.74 : 247,013.04 = 98,421.78 : x
  2. Step 2: Convert to fraction form
    178,993.74/247,013.04 = 98,421.78/x
  3. Step 3: Cross multiply
    178,993.74x = 247,013.04 × 98,421.78
  4. Step 4: Simplify right side
    178,993.74x = 24,311,463,080.01
  5. Step 5: Solve for x
    x = 24,311,463,080.01/178,993.74
  6. Step 6: Final answer
    x = 135,822.98

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Why These Related Problems?

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