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Finding the Fourth Proportional to 72,560.21, 108,729.34 and 30,417.32

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Solution

The fourth proportional to 72,560.21, 108,729.34 and 30,417.32 is: 45,579.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,560.21 : 108,729.34 = 30,417.32 : x
  2. Step 2: Convert to fraction form
    72,560.21/108,729.34 = 30,417.32/x
  3. Step 3: Cross multiply
    72,560.21x = 108,729.34 × 30,417.32
  4. Step 4: Simplify right side
    72,560.21x = 3,307,255,323.95
  5. Step 5: Solve for x
    x = 3,307,255,323.95/72,560.21
  6. Step 6: Final answer
    x = 45,579.46

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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.