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Finding the Fourth Proportional to 118,482.16, 163,505 and 64,767.20

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Solution

The fourth proportional to 118,482.16, 163,505 and 64,767.20 is: 89,378.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,482.16 : 163,505 = 64,767.20 : x
  2. Step 2: Convert to fraction form
    118,482.16/163,505 = 64,767.20/x
  3. Step 3: Cross multiply
    118,482.16x = 163,505 × 64,767.20
  4. Step 4: Simplify right side
    118,482.16x = 10,589,761,036
  5. Step 5: Solve for x
    x = 10,589,761,036/118,482.16
  6. Step 6: Final answer
    x = 89,378.53

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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.