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Finding the Fourth Proportional to 72,566.16, 100,130.41 and 40,728.91

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Solution

The fourth proportional to 72,566.16, 100,130.41 and 40,728.91 is: 56,199.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,566.16 : 100,130.41 = 40,728.91 : x
  2. Step 2: Convert to fraction form
    72,566.16/100,130.41 = 40,728.91/x
  3. Step 3: Cross multiply
    72,566.16x = 100,130.41 × 40,728.91
  4. Step 4: Simplify right side
    72,566.16x = 4,078,202,457.15
  5. Step 5: Solve for x
    x = 4,078,202,457.15/72,566.16
  6. Step 6: Final answer
    x = 56,199.78

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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.