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Finding the Fourth Proportional to 61,107.60, 91,661.40 and 53,720.40

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Solution

The fourth proportional to 61,107.60, 91,661.40 and 53,720.40 is: 80,580.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,107.60 : 91,661.40 = 53,720.40 : x
  2. Step 2: Convert to fraction form
    61,107.60/91,661.40 = 53,720.40/x
  3. Step 3: Cross multiply
    61,107.60x = 91,661.40 × 53,720.40
  4. Step 4: Simplify right side
    61,107.60x = 4,924,087,072.56
  5. Step 5: Solve for x
    x = 4,924,087,072.56/61,107.60
  6. Step 6: Final answer
    x = 80,580.60

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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.