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Finding the Fourth Proportional to 72,562.82, 100,135.86 and 40,730.90

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Solution

The fourth proportional to 72,562.82, 100,135.86 and 40,730.90 is: 56,208.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,562.82 : 100,135.86 = 40,730.90 : x
  2. Step 2: Convert to fraction form
    72,562.82/100,135.86 = 40,730.90/x
  3. Step 3: Cross multiply
    72,562.82x = 100,135.86 × 40,730.90
  4. Step 4: Simplify right side
    72,562.82x = 4,078,623,700.07
  5. Step 5: Solve for x
    x = 4,078,623,700.07/72,562.82
  6. Step 6: Final answer
    x = 56,208.18

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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.