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Finding the Fourth Proportional to 138,300.01, 190,868.30 and 84,620.70

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Solution

The fourth proportional to 138,300.01, 190,868.30 and 84,620.70 is: 116,785.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,300.01 : 190,868.30 = 84,620.70 : x
  2. Step 2: Convert to fraction form
    138,300.01/190,868.30 = 84,620.70/x
  3. Step 3: Cross multiply
    138,300.01x = 190,868.30 × 84,620.70
  4. Step 4: Simplify right side
    138,300.01x = 16,151,409,048.03
  5. Step 5: Solve for x
    x = 16,151,409,048.03/138,300.01
  6. Step 6: Final answer
    x = 116,785.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.