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Finding the Fourth Proportional to 72,002.10, 108,003.15 and 19,416.90

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Solution

The fourth proportional to 72,002.10, 108,003.15 and 19,416.90 is: 29,125.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,002.10 : 108,003.15 = 19,416.90 : x
  2. Step 2: Convert to fraction form
    72,002.10/108,003.15 = 19,416.90/x
  3. Step 3: Cross multiply
    72,002.10x = 108,003.15 × 19,416.90
  4. Step 4: Simplify right side
    72,002.10x = 2,097,086,363.24
  5. Step 5: Solve for x
    x = 2,097,086,363.24/72,002.10
  6. Step 6: Final answer
    x = 29,125.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.