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Finding the Fourth Proportional to 138,015.40, 207,047.40 and 49,320.40

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Solution

The fourth proportional to 138,015.40, 207,047.40 and 49,320.40 is: 73,989.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,015.40 : 207,047.40 = 49,320.40 : x
  2. Step 2: Convert to fraction form
    138,015.40/207,047.40 = 49,320.40/x
  3. Step 3: Cross multiply
    138,015.40x = 207,047.40 × 49,320.40
  4. Step 4: Simplify right side
    138,015.40x = 10,211,660,586.96
  5. Step 5: Solve for x
    x = 10,211,660,586.96/138,015.40
  6. Step 6: Final answer
    x = 73,989.28

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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.