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Finding the Fourth Proportional to 64,474.58, 89,011.96 and 42,958.65

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Solution

The fourth proportional to 64,474.58, 89,011.96 and 42,958.65 is: 59,307.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,474.58 : 89,011.96 = 42,958.65 : x
  2. Step 2: Convert to fraction form
    64,474.58/89,011.96 = 42,958.65/x
  3. Step 3: Cross multiply
    64,474.58x = 89,011.96 × 42,958.65
  4. Step 4: Simplify right side
    64,474.58x = 3,823,834,103.49
  5. Step 5: Solve for x
    x = 3,823,834,103.49/64,474.58
  6. Step 6: Final answer
    x = 59,307.62

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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.