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Finding the Fourth Proportional to 61,172.10, 91,758.15 and 43,457.40

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Solution

The fourth proportional to 61,172.10, 91,758.15 and 43,457.40 is: 65,186.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,172.10 : 91,758.15 = 43,457.40 : x
  2. Step 2: Convert to fraction form
    61,172.10/91,758.15 = 43,457.40/x
  3. Step 3: Cross multiply
    61,172.10x = 91,758.15 × 43,457.40
  4. Step 4: Simplify right side
    61,172.10x = 3,987,570,627.81
  5. Step 5: Solve for x
    x = 3,987,570,627.81/61,172.10
  6. Step 6: Final answer
    x = 65,186.10

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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.