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Finding the Fourth Proportional to 66,081.51, 99,132.63 and 21,698.17

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Solution

The fourth proportional to 66,081.51, 99,132.63 and 21,698.17 is: 32,550.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,081.51 : 99,132.63 = 21,698.17 : x
  2. Step 2: Convert to fraction form
    66,081.51/99,132.63 = 21,698.17/x
  3. Step 3: Cross multiply
    66,081.51x = 99,132.63 × 21,698.17
  4. Step 4: Simplify right side
    66,081.51x = 2,150,996,658.29
  5. Step 5: Solve for x
    x = 2,150,996,658.29/66,081.51
  6. Step 6: Final answer
    x = 32,550.66

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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.