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Finding the Fourth Proportional to 84,903.45, 127,378.15 and 28,743.57

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Solution

The fourth proportional to 84,903.45, 127,378.15 and 28,743.57 is: 43,123.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,903.45 : 127,378.15 = 28,743.57 : x
  2. Step 2: Convert to fraction form
    84,903.45/127,378.15 = 28,743.57/x
  3. Step 3: Cross multiply
    84,903.45x = 127,378.15 × 28,743.57
  4. Step 4: Simplify right side
    84,903.45x = 3,661,301,990.39
  5. Step 5: Solve for x
    x = 3,661,301,990.39/84,903.45
  6. Step 6: Final answer
    x = 43,123.12

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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.