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Finding the Fourth Proportional to 90,404.70, 135,477.45 and 66,525.90

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Solution

The fourth proportional to 90,404.70, 135,477.45 and 66,525.90 is: 99,693.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,404.70 : 135,477.45 = 66,525.90 : x
  2. Step 2: Convert to fraction form
    90,404.70/135,477.45 = 66,525.90/x
  3. Step 3: Cross multiply
    90,404.70x = 135,477.45 × 66,525.90
  4. Step 4: Simplify right side
    90,404.70x = 9,012,759,290.96
  5. Step 5: Solve for x
    x = 9,012,759,290.96/90,404.70
  6. Step 6: Final answer
    x = 99,693.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.