Home / 111,431.36-153,772.64-61,129.92

Finding the Fourth Proportional to 111,431.36, 153,772.64 and 61,129.92

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Solution

The fourth proportional to 111,431.36, 153,772.64 and 61,129.92 is: 84,357.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,431.36 : 153,772.64 = 61,129.92 : x
  2. Step 2: Convert to fraction form
    111,431.36/153,772.64 = 61,129.92/x
  3. Step 3: Cross multiply
    111,431.36x = 153,772.64 × 61,129.92
  4. Step 4: Simplify right side
    111,431.36x = 9,400,109,181.39
  5. Step 5: Solve for x
    x = 9,400,109,181.39/111,431.36
  6. Step 6: Final answer
    x = 84,357.84

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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.