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Finding the Fourth Proportional to 72,490.88, 100,038.12 and 40,226.24

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Solution

The fourth proportional to 72,490.88, 100,038.12 and 40,226.24 is: 55,512.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,490.88 : 100,038.12 = 40,226.24 : x
  2. Step 2: Convert to fraction form
    72,490.88/100,038.12 = 40,226.24/x
  3. Step 3: Cross multiply
    72,490.88x = 100,038.12 × 40,226.24
  4. Step 4: Simplify right side
    72,490.88x = 4,024,157,424.27
  5. Step 5: Solve for x
    x = 4,024,157,424.27/72,490.88
  6. Step 6: Final answer
    x = 55,512.60

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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.