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Finding the Fourth Proportional to 66,477.25, 99,659.95 and 30,920.51

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Solution

The fourth proportional to 66,477.25, 99,659.95 and 30,920.51 is: 46,354.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,477.25 : 99,659.95 = 30,920.51 : x
  2. Step 2: Convert to fraction form
    66,477.25/99,659.95 = 30,920.51/x
  3. Step 3: Cross multiply
    66,477.25x = 99,659.95 × 30,920.51
  4. Step 4: Simplify right side
    66,477.25x = 3,081,536,154.12
  5. Step 5: Solve for x
    x = 3,081,536,154.12/66,477.25
  6. Step 6: Final answer
    x = 46,354.75

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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.