Home / 156,135.21-215,466.71-84,515.01

Finding the Fourth Proportional to 156,135.21, 215,466.71 and 84,515.01

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Solution

The fourth proportional to 156,135.21, 215,466.71 and 84,515.01 is: 116,630.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,135.21 : 215,466.71 = 84,515.01 : x
  2. Step 2: Convert to fraction form
    156,135.21/215,466.71 = 84,515.01/x
  3. Step 3: Cross multiply
    156,135.21x = 215,466.71 × 84,515.01
  4. Step 4: Simplify right side
    156,135.21x = 18,210,170,727.74
  5. Step 5: Solve for x
    x = 18,210,170,727.74/156,135.21
  6. Step 6: Final answer
    x = 116,630.78

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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.