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Finding the Fourth Proportional to 99,169.76, 136,820.07 and 63,380.72

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Solution

The fourth proportional to 99,169.76, 136,820.07 and 63,380.72 is: 87,443.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,169.76 : 136,820.07 = 63,380.72 : x
  2. Step 2: Convert to fraction form
    99,169.76/136,820.07 = 63,380.72/x
  3. Step 3: Cross multiply
    99,169.76x = 136,820.07 × 63,380.72
  4. Step 4: Simplify right side
    99,169.76x = 8,671,754,889.10
  5. Step 5: Solve for x
    x = 8,671,754,889.10/99,169.76
  6. Step 6: Final answer
    x = 87,443.54

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1.5x scale

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.