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Finding the Fourth Proportional to 64,842.99, 89,425.11 and 55,317.24

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Solution

The fourth proportional to 64,842.99, 89,425.11 and 55,317.24 is: 76,288.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,842.99 : 89,425.11 = 55,317.24 : x
  2. Step 2: Convert to fraction form
    64,842.99/89,425.11 = 55,317.24/x
  3. Step 3: Cross multiply
    64,842.99x = 89,425.11 × 55,317.24
  4. Step 4: Simplify right side
    64,842.99x = 4,946,750,271.90
  5. Step 5: Solve for x
    x = 4,946,750,271.90/64,842.99
  6. Step 6: Final answer
    x = 76,288.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.