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Finding the Fourth Proportional to 72,570.98, 108,828.48 and 28,191.90

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Solution

The fourth proportional to 72,570.98, 108,828.48 and 28,191.90 is: 42,276.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,570.98 : 108,828.48 = 28,191.90 : x
  2. Step 2: Convert to fraction form
    72,570.98/108,828.48 = 28,191.90/x
  3. Step 3: Cross multiply
    72,570.98x = 108,828.48 × 28,191.90
  4. Step 4: Simplify right side
    72,570.98x = 3,068,081,625.31
  5. Step 5: Solve for x
    x = 3,068,081,625.31/72,570.98
  6. Step 6: Final answer
    x = 42,276.98

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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.