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Finding the Fourth Proportional to 118,218.16, 163,076.52 and 75,728.80

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Solution

The fourth proportional to 118,218.16, 163,076.52 and 75,728.80 is: 104,464.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,218.16 : 163,076.52 = 75,728.80 : x
  2. Step 2: Convert to fraction form
    118,218.16/163,076.52 = 75,728.80/x
  3. Step 3: Cross multiply
    118,218.16x = 163,076.52 × 75,728.80
  4. Step 4: Simplify right side
    118,218.16x = 12,349,589,167.78
  5. Step 5: Solve for x
    x = 12,349,589,167.78/118,218.16
  6. Step 6: Final answer
    x = 104,464.40

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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.