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Finding the Fourth Proportional to 113,125.55, 156,078.14 and 65,361.47

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Solution

The fourth proportional to 113,125.55, 156,078.14 and 65,361.47 is: 90,178.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,125.55 : 156,078.14 = 65,361.47 : x
  2. Step 2: Convert to fraction form
    113,125.55/156,078.14 = 65,361.47/x
  3. Step 3: Cross multiply
    113,125.55x = 156,078.14 × 65,361.47
  4. Step 4: Simplify right side
    113,125.55x = 10,201,495,558.07
  5. Step 5: Solve for x
    x = 10,201,495,558.07/113,125.55
  6. Step 6: Final answer
    x = 90,178.53

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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.