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Finding the Fourth Proportional to 72,574.02, 108,810 and 28,163.34

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Solution

The fourth proportional to 72,574.02, 108,810 and 28,163.34 is: 42,225.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,574.02 : 108,810 = 28,163.34 : x
  2. Step 2: Convert to fraction form
    72,574.02/108,810 = 28,163.34/x
  3. Step 3: Cross multiply
    72,574.02x = 108,810 × 28,163.34
  4. Step 4: Simplify right side
    72,574.02x = 3,064,453,025.40
  5. Step 5: Solve for x
    x = 3,064,453,025.40/72,574.02
  6. Step 6: Final answer
    x = 42,225.21

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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.