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Finding the Fourth Proportional to 111,493, 153,879.78 and 63,748.36

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Solution

The fourth proportional to 111,493, 153,879.78 and 63,748.36 is: 87,983.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,493 : 153,879.78 = 63,748.36 : x
  2. Step 2: Convert to fraction form
    111,493/153,879.78 = 63,748.36/x
  3. Step 3: Cross multiply
    111,493x = 153,879.78 × 63,748.36
  4. Step 4: Simplify right side
    111,493x = 9,809,583,612.16
  5. Step 5: Solve for x
    x = 9,809,583,612.16/111,493
  6. Step 6: Final answer
    x = 87,983.85

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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.