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Finding the Fourth Proportional to 73,990.40, 102,109.12 and 40,456.64

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Solution

The fourth proportional to 73,990.40, 102,109.12 and 40,456.64 is: 55,831.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,990.40 : 102,109.12 = 40,456.64 : x
  2. Step 2: Convert to fraction form
    73,990.40/102,109.12 = 40,456.64/x
  3. Step 3: Cross multiply
    73,990.40x = 102,109.12 × 40,456.64
  4. Step 4: Simplify right side
    73,990.40x = 4,130,991,908.56
  5. Step 5: Solve for x
    x = 4,130,991,908.56/73,990.40
  6. Step 6: Final answer
    x = 55,831.46

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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.