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Finding the Fourth Proportional to 55,783.89, 76,981.89 and 30,290.25

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Solution

The fourth proportional to 55,783.89, 76,981.89 and 30,290.25 is: 41,800.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,783.89 : 76,981.89 = 30,290.25 : x
  2. Step 2: Convert to fraction form
    55,783.89/76,981.89 = 30,290.25/x
  3. Step 3: Cross multiply
    55,783.89x = 76,981.89 × 30,290.25
  4. Step 4: Simplify right side
    55,783.89x = 2,331,801,095.84
  5. Step 5: Solve for x
    x = 2,331,801,095.84/55,783.89
  6. Step 6: Final answer
    x = 41,800.62

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1.5x scale

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.