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Finding the Fourth Proportional to 88,971.36, 133,609.60 and 78,998.56

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Solution

The fourth proportional to 88,971.36, 133,609.60 and 78,998.56 is: 118,633.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,971.36 : 133,609.60 = 78,998.56 : x
  2. Step 2: Convert to fraction form
    88,971.36/133,609.60 = 78,998.56/x
  3. Step 3: Cross multiply
    88,971.36x = 133,609.60 × 78,998.56
  4. Step 4: Simplify right side
    88,971.36x = 10,554,966,002.18
  5. Step 5: Solve for x
    x = 10,554,966,002.18/88,971.36
  6. Step 6: Final answer
    x = 118,633.30

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1.5x scale

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.