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Finding the Fourth Proportional to 66,603.60, 92,021 and 65,948.24

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Solution

The fourth proportional to 66,603.60, 92,021 and 65,948.24 is: 91,115.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,603.60 : 92,021 = 65,948.24 : x
  2. Step 2: Convert to fraction form
    66,603.60/92,021 = 65,948.24/x
  3. Step 3: Cross multiply
    66,603.60x = 92,021 × 65,948.24
  4. Step 4: Simplify right side
    66,603.60x = 6,068,622,993.04
  5. Step 5: Solve for x
    x = 6,068,622,993.04/66,603.60
  6. Step 6: Final answer
    x = 91,115.54

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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.