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Finding the Fourth Proportional to 66,435.54, 91,669.77 and 38,140.62

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Solution

The fourth proportional to 66,435.54, 91,669.77 and 38,140.62 is: 52,627.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,435.54 : 91,669.77 = 38,140.62 : x
  2. Step 2: Convert to fraction form
    66,435.54/91,669.77 = 38,140.62/x
  3. Step 3: Cross multiply
    66,435.54x = 91,669.77 × 38,140.62
  4. Step 4: Simplify right side
    66,435.54x = 3,496,341,863.06
  5. Step 5: Solve for x
    x = 3,496,341,863.06/66,435.54
  6. Step 6: Final answer
    x = 52,627.58

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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.