Home / 111,495.16-153,823.60-66,138.40

Finding the Fourth Proportional to 111,495.16, 153,823.60 and 66,138.40

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Solution

The fourth proportional to 111,495.16, 153,823.60 and 66,138.40 is: 91,247.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,495.16 : 153,823.60 = 66,138.40 : x
  2. Step 2: Convert to fraction form
    111,495.16/153,823.60 = 66,138.40/x
  3. Step 3: Cross multiply
    111,495.16x = 153,823.60 × 66,138.40
  4. Step 4: Simplify right side
    111,495.16x = 10,173,646,786.24
  5. Step 5: Solve for x
    x = 10,173,646,786.24/111,495.16
  6. Step 6: Final answer
    x = 91,247.43

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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.