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Finding the Fourth Proportional to 72,889.16, 100,588.10 and 40,622.88

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Solution

The fourth proportional to 72,889.16, 100,588.10 and 40,622.88 is: 56,060.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,889.16 : 100,588.10 = 40,622.88 : x
  2. Step 2: Convert to fraction form
    72,889.16/100,588.10 = 40,622.88/x
  3. Step 3: Cross multiply
    72,889.16x = 100,588.10 × 40,622.88
  4. Step 4: Simplify right side
    72,889.16x = 4,086,178,315.73
  5. Step 5: Solve for x
    x = 4,086,178,315.73/72,889.16
  6. Step 6: Final answer
    x = 56,060.16

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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.