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Finding the Fourth Proportional to 118,605.34, 163,743.04 and 78,435.62

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Solution

The fourth proportional to 118,605.34, 163,743.04 and 78,435.62 is: 108,285.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,605.34 : 163,743.04 = 78,435.62 : x
  2. Step 2: Convert to fraction form
    118,605.34/163,743.04 = 78,435.62/x
  3. Step 3: Cross multiply
    118,605.34x = 163,743.04 × 78,435.62
  4. Step 4: Simplify right side
    118,605.34x = 12,843,286,756.45
  5. Step 5: Solve for x
    x = 12,843,286,756.45/118,605.34
  6. Step 6: Final answer
    x = 108,285.91

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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.