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Finding the Fourth Proportional to 64,299.12, 96,430 and 19,318.64

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Solution

The fourth proportional to 64,299.12, 96,430 and 19,318.64 is: 28,972.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,299.12 : 96,430 = 19,318.64 : x
  2. Step 2: Convert to fraction form
    64,299.12/96,430 = 19,318.64/x
  3. Step 3: Cross multiply
    64,299.12x = 96,430 × 19,318.64
  4. Step 4: Simplify right side
    64,299.12x = 1,862,896,455.20
  5. Step 5: Solve for x
    x = 1,862,896,455.20/64,299.12
  6. Step 6: Final answer
    x = 28,972.35

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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.