Home / 111,165.36-153,410.16-79,388.40

Finding the Fourth Proportional to 111,165.36, 153,410.16 and 79,388.40

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Solution

The fourth proportional to 111,165.36, 153,410.16 and 79,388.40 is: 109,557.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,165.36 : 153,410.16 = 79,388.40 : x
  2. Step 2: Convert to fraction form
    111,165.36/153,410.16 = 79,388.40/x
  3. Step 3: Cross multiply
    111,165.36x = 153,410.16 × 79,388.40
  4. Step 4: Simplify right side
    111,165.36x = 12,178,987,146.14
  5. Step 5: Solve for x
    x = 12,178,987,146.14/111,165.36
  6. Step 6: Final answer
    x = 109,557.39

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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.