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Finding the Fourth Proportional to 66,020, 91,107.60 and 36,211.36

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Solution

The fourth proportional to 66,020, 91,107.60 and 36,211.36 is: 49,971.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,020 : 91,107.60 = 36,211.36 : x
  2. Step 2: Convert to fraction form
    66,020/91,107.60 = 36,211.36/x
  3. Step 3: Cross multiply
    66,020x = 91,107.60 × 36,211.36
  4. Step 4: Simplify right side
    66,020x = 3,299,130,102.34
  5. Step 5: Solve for x
    x = 3,299,130,102.34/66,020
  6. Step 6: Final answer
    x = 49,971.68

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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.