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Finding the Fourth Proportional to 72,452.10, 108,678.90 and 19,861.58

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Solution

The fourth proportional to 72,452.10, 108,678.90 and 19,861.58 is: 29,792.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,452.10 : 108,678.90 = 19,861.58 : x
  2. Step 2: Convert to fraction form
    72,452.10/108,678.90 = 19,861.58/x
  3. Step 3: Cross multiply
    72,452.10x = 108,678.90 × 19,861.58
  4. Step 4: Simplify right side
    72,452.10x = 2,158,534,666.66
  5. Step 5: Solve for x
    x = 2,158,534,666.66/72,452.10
  6. Step 6: Final answer
    x = 29,792.58

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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.