Home / 111,138.16-153,442.20-99,180.96

Finding the Fourth Proportional to 111,138.16, 153,442.20 and 99,180.96

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Solution

The fourth proportional to 111,138.16, 153,442.20 and 99,180.96 is: 136,933.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,138.16 : 153,442.20 = 99,180.96 : x
  2. Step 2: Convert to fraction form
    111,138.16/153,442.20 = 99,180.96/x
  3. Step 3: Cross multiply
    111,138.16x = 153,442.20 × 99,180.96
  4. Step 4: Simplify right side
    111,138.16x = 15,218,544,700.51
  5. Step 5: Solve for x
    x = 15,218,544,700.51/111,138.16
  6. Step 6: Final answer
    x = 136,933.57

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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.