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Finding the Fourth Proportional to 72,415.40, 108,630.60 and 19,824.89

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Solution

The fourth proportional to 72,415.40, 108,630.60 and 19,824.89 is: 29,739.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,415.40 : 108,630.60 = 19,824.89 : x
  2. Step 2: Convert to fraction form
    72,415.40/108,630.60 = 19,824.89/x
  3. Step 3: Cross multiply
    72,415.40x = 108,630.60 × 19,824.89
  4. Step 4: Simplify right side
    72,415.40x = 2,153,589,695.63
  5. Step 5: Solve for x
    x = 2,153,589,695.63/72,415.40
  6. Step 6: Final answer
    x = 29,739.39

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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.