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Finding the Fourth Proportional to 64,813, 97,219.50 and 21,037

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Solution

The fourth proportional to 64,813, 97,219.50 and 21,037 is: 31,555.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,813 : 97,219.50 = 21,037 : x
  2. Step 2: Convert to fraction form
    64,813/97,219.50 = 21,037/x
  3. Step 3: Cross multiply
    64,813x = 97,219.50 × 21,037
  4. Step 4: Simplify right side
    64,813x = 2,045,206,621.50
  5. Step 5: Solve for x
    x = 2,045,206,621.50/64,813
  6. Step 6: Final answer
    x = 31,555.50

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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.