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Finding the Fourth Proportional to 178,988.59, 247,005.17 and 98,421.33

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Solution

The fourth proportional to 178,988.59, 247,005.17 and 98,421.33 is: 135,821.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,988.59 : 247,005.17 = 98,421.33 : x
  2. Step 2: Convert to fraction form
    178,988.59/247,005.17 = 98,421.33/x
  3. Step 3: Cross multiply
    178,988.59x = 247,005.17 × 98,421.33
  4. Step 4: Simplify right side
    178,988.59x = 24,310,577,038.92
  5. Step 5: Solve for x
    x = 24,310,577,038.92/178,988.59
  6. Step 6: Final answer
    x = 135,821.94

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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.