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Finding the Fourth Proportional to 102,667.60, 154,001.40 and 84,005.20

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Solution

The fourth proportional to 102,667.60, 154,001.40 and 84,005.20 is: 126,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,667.60 : 154,001.40 = 84,005.20 : x
  2. Step 2: Convert to fraction form
    102,667.60/154,001.40 = 84,005.20/x
  3. Step 3: Cross multiply
    102,667.60x = 154,001.40 × 84,005.20
  4. Step 4: Simplify right side
    102,667.60x = 12,936,918,407.28
  5. Step 5: Solve for x
    x = 12,936,918,407.28/102,667.60
  6. Step 6: Final answer
    x = 126,007.80

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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.