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Finding the Fourth Proportional to 66,476.81, 99,659.30 and 30,920.06

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Solution

The fourth proportional to 66,476.81, 99,659.30 and 30,920.06 is: 46,354.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,476.81 : 99,659.30 = 30,920.06 : x
  2. Step 2: Convert to fraction form
    66,476.81/99,659.30 = 30,920.06/x
  3. Step 3: Cross multiply
    66,476.81x = 99,659.30 × 30,920.06
  4. Step 4: Simplify right side
    66,476.81x = 3,081,471,630.11
  5. Step 5: Solve for x
    x = 3,081,471,630.11/66,476.81
  6. Step 6: Final answer
    x = 46,354.08

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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.