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Finding the Fourth Proportional to 84,903.70, 127,274.55 and 31,581.40

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Solution

The fourth proportional to 84,903.70, 127,274.55 and 31,581.40 is: 47,341.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,903.70 : 127,274.55 = 31,581.40 : x
  2. Step 2: Convert to fraction form
    84,903.70/127,274.55 = 31,581.40/x
  3. Step 3: Cross multiply
    84,903.70x = 127,274.55 × 31,581.40
  4. Step 4: Simplify right side
    84,903.70x = 4,019,508,473.37
  5. Step 5: Solve for x
    x = 4,019,508,473.37/84,903.70
  6. Step 6: Final answer
    x = 47,341.97

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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.