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Finding the Fourth Proportional to 99,242.58, 136,920.30 and 63,453.54

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Solution

The fourth proportional to 99,242.58, 136,920.30 and 63,453.54 is: 87,543.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,242.58 : 136,920.30 = 63,453.54 : x
  2. Step 2: Convert to fraction form
    99,242.58/136,920.30 = 63,453.54/x
  3. Step 3: Cross multiply
    99,242.58x = 136,920.30 × 63,453.54
  4. Step 4: Simplify right side
    99,242.58x = 8,688,077,732.86
  5. Step 5: Solve for x
    x = 8,688,077,732.86/99,242.58
  6. Step 6: Final answer
    x = 87,543.85

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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.