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Finding the Fourth Proportional to 64,890.80, 97,379.40 and 29,812.40

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Solution

The fourth proportional to 64,890.80, 97,379.40 and 29,812.40 is: 44,738.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,890.80 : 97,379.40 = 29,812.40 : x
  2. Step 2: Convert to fraction form
    64,890.80/97,379.40 = 29,812.40/x
  3. Step 3: Cross multiply
    64,890.80x = 97,379.40 × 29,812.40
  4. Step 4: Simplify right side
    64,890.80x = 2,903,113,624.56
  5. Step 5: Solve for x
    x = 2,903,113,624.56/64,890.80
  6. Step 6: Final answer
    x = 44,738.45

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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.