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Finding the Fourth Proportional to 66,064, 91,168.32 and 39,568

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Solution

The fourth proportional to 66,064, 91,168.32 and 39,568 is: 54,603.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,064 : 91,168.32 = 39,568 : x
  2. Step 2: Convert to fraction form
    66,064/91,168.32 = 39,568/x
  3. Step 3: Cross multiply
    66,064x = 91,168.32 × 39,568
  4. Step 4: Simplify right side
    66,064x = 3,607,348,085.76
  5. Step 5: Solve for x
    x = 3,607,348,085.76/66,064
  6. Step 6: Final answer
    x = 54,603.84

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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.