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Finding the Fourth Proportional to 111,509.64, 153,886.32 and 63,108

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Solution

The fourth proportional to 111,509.64, 153,886.32 and 63,108 is: 87,090.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,509.64 : 153,886.32 = 63,108 : x
  2. Step 2: Convert to fraction form
    111,509.64/153,886.32 = 63,108/x
  3. Step 3: Cross multiply
    111,509.64x = 153,886.32 × 63,108
  4. Step 4: Simplify right side
    111,509.64x = 9,711,457,882.56
  5. Step 5: Solve for x
    x = 9,711,457,882.56/111,509.64
  6. Step 6: Final answer
    x = 87,090.75

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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.