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Finding the Fourth Proportional to 72,842.60, 109,290.06 and 28,501.24

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Solution

The fourth proportional to 72,842.60, 109,290.06 and 28,501.24 is: 42,762.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,842.60 : 109,290.06 = 28,501.24 : x
  2. Step 2: Convert to fraction form
    72,842.60/109,290.06 = 28,501.24/x
  3. Step 3: Cross multiply
    72,842.60x = 109,290.06 × 28,501.24
  4. Step 4: Simplify right side
    72,842.60x = 3,114,902,229.67
  5. Step 5: Solve for x
    x = 3,114,902,229.67/72,842.60
  6. Step 6: Final answer
    x = 42,762.10

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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.