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Finding the Fourth Proportional to 66,013, 91,103.70 and 36,210.76

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Solution

The fourth proportional to 66,013, 91,103.70 and 36,210.76 is: 49,974.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,013 : 91,103.70 = 36,210.76 : x
  2. Step 2: Convert to fraction form
    66,013/91,103.70 = 36,210.76/x
  3. Step 3: Cross multiply
    66,013x = 91,103.70 × 36,210.76
  4. Step 4: Simplify right side
    66,013x = 3,298,934,215.81
  5. Step 5: Solve for x
    x = 3,298,934,215.81/66,013
  6. Step 6: Final answer
    x = 49,974.01

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Double scale
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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.