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Finding the Fourth Proportional to 128,004.91, 191,947.97 and 74,712.23

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Solution

The fourth proportional to 128,004.91, 191,947.97 and 74,712.23 is: 112,033.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,004.91 : 191,947.97 = 74,712.23 : x
  2. Step 2: Convert to fraction form
    128,004.91/191,947.97 = 74,712.23/x
  3. Step 3: Cross multiply
    128,004.91x = 191,947.97 × 74,712.23
  4. Step 4: Simplify right side
    128,004.91x = 14,340,859,549.37
  5. Step 5: Solve for x
    x = 14,340,859,549.37/128,004.91
  6. Step 6: Final answer
    x = 112,033.67

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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.