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Finding the Fourth Proportional to 66,321.42, 91,367.93 and 46,143.61

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Solution

The fourth proportional to 66,321.42, 91,367.93 and 46,143.61 is: 63,569.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,321.42 : 91,367.93 = 46,143.61 : x
  2. Step 2: Convert to fraction form
    66,321.42/91,367.93 = 46,143.61/x
  3. Step 3: Cross multiply
    66,321.42x = 91,367.93 × 46,143.61
  4. Step 4: Simplify right side
    66,321.42x = 4,216,046,015.37
  5. Step 5: Solve for x
    x = 4,216,046,015.37/66,321.42
  6. Step 6: Final answer
    x = 63,569.90

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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.