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Finding the Fourth Proportional to 66,078.72, 91,189.32 and 35,864.32

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Solution

The fourth proportional to 66,078.72, 91,189.32 and 35,864.32 is: 49,493.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,078.72 : 91,189.32 = 35,864.32 : x
  2. Step 2: Convert to fraction form
    66,078.72/91,189.32 = 35,864.32/x
  3. Step 3: Cross multiply
    66,078.72x = 91,189.32 × 35,864.32
  4. Step 4: Simplify right side
    66,078.72x = 3,270,442,953.06
  5. Step 5: Solve for x
    x = 3,270,442,953.06/66,078.72
  6. Step 6: Final answer
    x = 49,493.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.