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Finding the Fourth Proportional to 111,463.91, 153,815.32 and 63,720.33

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Solution

The fourth proportional to 111,463.91, 153,815.32 and 63,720.33 is: 87,931.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,463.91 : 153,815.32 = 63,720.33 : x
  2. Step 2: Convert to fraction form
    111,463.91/153,815.32 = 63,720.33/x
  3. Step 3: Cross multiply
    111,463.91x = 153,815.32 × 63,720.33
  4. Step 4: Simplify right side
    111,463.91x = 9,801,162,630.85
  5. Step 5: Solve for x
    x = 9,801,162,630.85/111,463.91
  6. Step 6: Final answer
    x = 87,931.27

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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.