Home / 111,009.12-153,206.58-72,800.80

Finding the Fourth Proportional to 111,009.12, 153,206.58 and 72,800.80

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Solution

The fourth proportional to 111,009.12, 153,206.58 and 72,800.80 is: 100,474.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,009.12 : 153,206.58 = 72,800.80 : x
  2. Step 2: Convert to fraction form
    111,009.12/153,206.58 = 72,800.80/x
  3. Step 3: Cross multiply
    111,009.12x = 153,206.58 × 72,800.80
  4. Step 4: Simplify right side
    111,009.12x = 11,153,561,589.26
  5. Step 5: Solve for x
    x = 11,153,561,589.26/111,009.12
  6. Step 6: Final answer
    x = 100,474.28

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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.