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Finding the Fourth Proportional to 66,234.60, 91,371.60 and 39,358.08

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Solution

The fourth proportional to 66,234.60, 91,371.60 and 39,358.08 is: 54,295.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,234.60 : 91,371.60 = 39,358.08 : x
  2. Step 2: Convert to fraction form
    66,234.60/91,371.60 = 39,358.08/x
  3. Step 3: Cross multiply
    66,234.60x = 91,371.60 × 39,358.08
  4. Step 4: Simplify right side
    66,234.60x = 3,596,210,742.53
  5. Step 5: Solve for x
    x = 3,596,210,742.53/66,234.60
  6. Step 6: Final answer
    x = 54,295.05

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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.