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Finding the Fourth Proportional to 66,722.16, 100,054 and 19,964.08

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Solution

The fourth proportional to 66,722.16, 100,054 and 19,964.08 is: 29,937.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,722.16 : 100,054 = 19,964.08 : x
  2. Step 2: Convert to fraction form
    66,722.16/100,054 = 19,964.08/x
  3. Step 3: Cross multiply
    66,722.16x = 100,054 × 19,964.08
  4. Step 4: Simplify right side
    66,722.16x = 1,997,486,060.32
  5. Step 5: Solve for x
    x = 1,997,486,060.32/66,722.16
  6. Step 6: Final answer
    x = 29,937.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.