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Finding the Fourth Proportional to 72,662.90, 100,277.34 and 40,831.16

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Solution

The fourth proportional to 72,662.90, 100,277.34 and 40,831.16 is: 56,348.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,662.90 : 100,277.34 = 40,831.16 : x
  2. Step 2: Convert to fraction form
    72,662.90/100,277.34 = 40,831.16/x
  3. Step 3: Cross multiply
    72,662.90x = 100,277.34 × 40,831.16
  4. Step 4: Simplify right side
    72,662.90x = 4,094,440,113.91
  5. Step 5: Solve for x
    x = 4,094,440,113.91/72,662.90
  6. Step 6: Final answer
    x = 56,348.43

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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.