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Finding the Fourth Proportional to 66,478.80, 91,554.12 and 65,027.28

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Solution

The fourth proportional to 66,478.80, 91,554.12 and 65,027.28 is: 89,555.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,478.80 : 91,554.12 = 65,027.28 : x
  2. Step 2: Convert to fraction form
    66,478.80/91,554.12 = 65,027.28/x
  3. Step 3: Cross multiply
    66,478.80x = 91,554.12 × 65,027.28
  4. Step 4: Simplify right side
    66,478.80x = 5,953,515,396.39
  5. Step 5: Solve for x
    x = 5,953,515,396.39/66,478.80
  6. Step 6: Final answer
    x = 89,555.10

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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.