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Finding the Fourth Proportional to 118,645.85, 163,729.07 and 64,929.78

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Solution

The fourth proportional to 118,645.85, 163,729.07 and 64,929.78 is: 89,601.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,645.85 : 163,729.07 = 64,929.78 : x
  2. Step 2: Convert to fraction form
    118,645.85/163,729.07 = 64,929.78/x
  3. Step 3: Cross multiply
    118,645.85x = 163,729.07 × 64,929.78
  4. Step 4: Simplify right side
    118,645.85x = 10,630,892,170.06
  5. Step 5: Solve for x
    x = 10,630,892,170.06/118,645.85
  6. Step 6: Final answer
    x = 89,601.89

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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.