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Finding the Fourth Proportional to 134,783.40, 202,320.90 and 84,919.80

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Solution

The fourth proportional to 134,783.40, 202,320.90 and 84,919.80 is: 127,471.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,783.40 : 202,320.90 = 84,919.80 : x
  2. Step 2: Convert to fraction form
    134,783.40/202,320.90 = 84,919.80/x
  3. Step 3: Cross multiply
    134,783.40x = 202,320.90 × 84,919.80
  4. Step 4: Simplify right side
    134,783.40x = 17,181,050,363.82
  5. Step 5: Solve for x
    x = 17,181,050,363.82/134,783.40
  6. Step 6: Final answer
    x = 127,471.56

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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.