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Finding the Fourth Proportional to 118,645.34, 163,728.38 and 64,929.28

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Solution

The fourth proportional to 118,645.34, 163,728.38 and 64,929.28 is: 89,601.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,645.34 : 163,728.38 = 64,929.28 : x
  2. Step 2: Convert to fraction form
    118,645.34/163,728.38 = 64,929.28/x
  3. Step 3: Cross multiply
    118,645.34x = 163,728.38 × 64,929.28
  4. Step 4: Simplify right side
    118,645.34x = 10,630,765,828.97
  5. Step 5: Solve for x
    x = 10,630,765,828.97/118,645.34
  6. Step 6: Final answer
    x = 89,601.21

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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.