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Finding the Fourth Proportional to 111,090.64, 153,308.94 and 60,789.64

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Solution

The fourth proportional to 111,090.64, 153,308.94 and 60,789.64 is: 83,891.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,090.64 : 153,308.94 = 60,789.64 : x
  2. Step 2: Convert to fraction form
    111,090.64/153,308.94 = 60,789.64/x
  3. Step 3: Cross multiply
    111,090.64x = 153,308.94 × 60,789.64
  4. Step 4: Simplify right side
    111,090.64x = 9,319,595,271.38
  5. Step 5: Solve for x
    x = 9,319,595,271.38/111,090.64
  6. Step 6: Final answer
    x = 83,891.81

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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.