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Finding the Fourth Proportional to 84,709.79, 127,057.80 and 28,548.69

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Solution

The fourth proportional to 84,709.79, 127,057.80 and 28,548.69 is: 42,820.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,709.79 : 127,057.80 = 28,548.69 : x
  2. Step 2: Convert to fraction form
    84,709.79/127,057.80 = 28,548.69/x
  3. Step 3: Cross multiply
    84,709.79x = 127,057.80 × 28,548.69
  4. Step 4: Simplify right side
    84,709.79x = 3,627,333,744.28
  5. Step 5: Solve for x
    x = 3,627,333,744.28/84,709.79
  6. Step 6: Final answer
    x = 42,820.71

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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.