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Finding the Fourth Proportional to 72,483.20, 100,031.10 and 40,653.86

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Solution

The fourth proportional to 72,483.20, 100,031.10 and 40,653.86 is: 56,104.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,483.20 : 100,031.10 = 40,653.86 : x
  2. Step 2: Convert to fraction form
    72,483.20/100,031.10 = 40,653.86/x
  3. Step 3: Cross multiply
    72,483.20x = 100,031.10 × 40,653.86
  4. Step 4: Simplify right side
    72,483.20x = 4,066,650,335.05
  5. Step 5: Solve for x
    x = 4,066,650,335.05/72,483.20
  6. Step 6: Final answer
    x = 56,104.73

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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.