Home / 72,567.86-100,138.20-40,730.66

Finding the Fourth Proportional to 72,567.86, 100,138.20 and 40,730.66

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Solution

The fourth proportional to 72,567.86, 100,138.20 and 40,730.66 is: 56,205.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,567.86 : 100,138.20 = 40,730.66 : x
  2. Step 2: Convert to fraction form
    72,567.86/100,138.20 = 40,730.66/x
  3. Step 3: Cross multiply
    72,567.86x = 100,138.20 × 40,730.66
  4. Step 4: Simplify right side
    72,567.86x = 4,078,694,977.21
  5. Step 5: Solve for x
    x = 4,078,694,977.21/72,567.86
  6. Step 6: Final answer
    x = 56,205.25

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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.