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Finding the Fourth Proportional to 90,728.16, 125,164.08 and 52,980

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Solution

The fourth proportional to 90,728.16, 125,164.08 and 52,980 is: 73,088.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,728.16 : 125,164.08 = 52,980 : x
  2. Step 2: Convert to fraction form
    90,728.16/125,164.08 = 52,980/x
  3. Step 3: Cross multiply
    90,728.16x = 125,164.08 × 52,980
  4. Step 4: Simplify right side
    90,728.16x = 6,631,192,958.40
  5. Step 5: Solve for x
    x = 6,631,192,958.40/90,728.16
  6. Step 6: Final answer
    x = 73,088.59

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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.