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Finding the Fourth Proportional to 66,145.80, 91,282.85 and 35,931.11

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Solution

The fourth proportional to 66,145.80, 91,282.85 and 35,931.11 is: 49,585.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,145.80 : 91,282.85 = 35,931.11 : x
  2. Step 2: Convert to fraction form
    66,145.80/91,282.85 = 35,931.11/x
  3. Step 3: Cross multiply
    66,145.80x = 91,282.85 × 35,931.11
  4. Step 4: Simplify right side
    66,145.80x = 3,279,893,944.81
  5. Step 5: Solve for x
    x = 3,279,893,944.81/66,145.80
  6. Step 6: Final answer
    x = 49,585.82

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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.