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Finding the Fourth Proportional to 170,436.80, 255,652.80 and 76,942.40

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Solution

The fourth proportional to 170,436.80, 255,652.80 and 76,942.40 is: 115,412.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,436.80 : 255,652.80 = 76,942.40 : x
  2. Step 2: Convert to fraction form
    170,436.80/255,652.80 = 76,942.40/x
  3. Step 3: Cross multiply
    170,436.80x = 255,652.80 × 76,942.40
  4. Step 4: Simplify right side
    170,436.80x = 19,670,539,998.72
  5. Step 5: Solve for x
    x = 19,670,539,998.72/170,436.80
  6. Step 6: Final answer
    x = 115,412.52

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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.