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Finding the Fourth Proportional to 64,974.04, 89,670.20 and 39,474.53

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Solution

The fourth proportional to 64,974.04, 89,670.20 and 39,474.53 is: 54,478.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,974.04 : 89,670.20 = 39,474.53 : x
  2. Step 2: Convert to fraction form
    64,974.04/89,670.20 = 39,474.53/x
  3. Step 3: Cross multiply
    64,974.04x = 89,670.20 × 39,474.53
  4. Step 4: Simplify right side
    64,974.04x = 3,539,689,000.01
  5. Step 5: Solve for x
    x = 3,539,689,000.01/64,974.04
  6. Step 6: Final answer
    x = 54,478.51

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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.