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Finding the Fourth Proportional to 170,580.80, 255,868.80 and 77,086.40

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Solution

The fourth proportional to 170,580.80, 255,868.80 and 77,086.40 is: 115,628.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,580.80 : 255,868.80 = 77,086.40 : x
  2. Step 2: Convert to fraction form
    170,580.80/255,868.80 = 77,086.40/x
  3. Step 3: Cross multiply
    170,580.80x = 255,868.80 × 77,086.40
  4. Step 4: Simplify right side
    170,580.80x = 19,724,004,664.32
  5. Step 5: Solve for x
    x = 19,724,004,664.32/170,580.80
  6. Step 6: Final answer
    x = 115,628.52

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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.