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Finding the Fourth Proportional to 66,165.85, 99,248.64 and 28,721.08

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Solution

The fourth proportional to 66,165.85, 99,248.64 and 28,721.08 is: 43,081.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,165.85 : 99,248.64 = 28,721.08 : x
  2. Step 2: Convert to fraction form
    66,165.85/99,248.64 = 28,721.08/x
  3. Step 3: Cross multiply
    66,165.85x = 99,248.64 × 28,721.08
  4. Step 4: Simplify right side
    66,165.85x = 2,850,528,129.33
  5. Step 5: Solve for x
    x = 2,850,528,129.33/66,165.85
  6. Step 6: Final answer
    x = 43,081.56

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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.