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Finding the Fourth Proportional to 111,007.12, 153,203.82 and 72,798.80

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Solution

The fourth proportional to 111,007.12, 153,203.82 and 72,798.80 is: 100,471.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,007.12 : 153,203.82 = 72,798.80 : x
  2. Step 2: Convert to fraction form
    111,007.12/153,203.82 = 72,798.80/x
  3. Step 3: Cross multiply
    111,007.12x = 153,203.82 × 72,798.80
  4. Step 4: Simplify right side
    111,007.12x = 11,153,054,251.42
  5. Step 5: Solve for x
    x = 11,153,054,251.42/111,007.12
  6. Step 6: Final answer
    x = 100,471.52

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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.