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Finding the Fourth Proportional to 115,276.80, 159,091.20 and 64,980.48

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Solution

The fourth proportional to 115,276.80, 159,091.20 and 64,980.48 is: 89,678.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,276.80 : 159,091.20 = 64,980.48 : x
  2. Step 2: Convert to fraction form
    115,276.80/159,091.20 = 64,980.48/x
  3. Step 3: Cross multiply
    115,276.80x = 159,091.20 × 64,980.48
  4. Step 4: Simplify right side
    115,276.80x = 10,337,822,539.78
  5. Step 5: Solve for x
    x = 10,337,822,539.78/115,276.80
  6. Step 6: Final answer
    x = 89,678.26

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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.