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Finding the Fourth Proportional to 128,001.60, 191,858.40 and 61,473.60

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Solution

The fourth proportional to 128,001.60, 191,858.40 and 61,473.60 is: 92,141.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,001.60 : 191,858.40 = 61,473.60 : x
  2. Step 2: Convert to fraction form
    128,001.60/191,858.40 = 61,473.60/x
  3. Step 3: Cross multiply
    128,001.60x = 191,858.40 × 61,473.60
  4. Step 4: Simplify right side
    128,001.60x = 11,794,226,538.24
  5. Step 5: Solve for x
    x = 11,794,226,538.24/128,001.60
  6. Step 6: Final answer
    x = 92,141.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.