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Finding the Fourth Proportional to 72,572.92, 108,866.23 and 28,203.08

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Solution

The fourth proportional to 72,572.92, 108,866.23 and 28,203.08 is: 42,307.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,572.92 : 108,866.23 = 28,203.08 : x
  2. Step 2: Convert to fraction form
    72,572.92/108,866.23 = 28,203.08/x
  3. Step 3: Cross multiply
    72,572.92x = 108,866.23 × 28,203.08
  4. Step 4: Simplify right side
    72,572.92x = 3,070,362,379.15
  5. Step 5: Solve for x
    x = 3,070,362,379.15/72,572.92
  6. Step 6: Final answer
    x = 42,307.28

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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.