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Finding the Fourth Proportional to 118,106.32, 162,981.92 and 64,390.28

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Solution

The fourth proportional to 118,106.32, 162,981.92 and 64,390.28 is: 88,855.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,106.32 : 162,981.92 = 64,390.28 : x
  2. Step 2: Convert to fraction form
    118,106.32/162,981.92 = 64,390.28/x
  3. Step 3: Cross multiply
    118,106.32x = 162,981.92 × 64,390.28
  4. Step 4: Simplify right side
    118,106.32x = 10,494,451,463.74
  5. Step 5: Solve for x
    x = 10,494,451,463.74/118,106.32
  6. Step 6: Final answer
    x = 88,855.97

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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.