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Finding the Fourth Proportional to 64,896.86, 97,405.43 and 39,985.58

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Solution

The fourth proportional to 64,896.86, 97,405.43 and 39,985.58 is: 60,015.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,896.86 : 97,405.43 = 39,985.58 : x
  2. Step 2: Convert to fraction form
    64,896.86/97,405.43 = 39,985.58/x
  3. Step 3: Cross multiply
    64,896.86x = 97,405.43 × 39,985.58
  4. Step 4: Simplify right side
    64,896.86x = 3,894,811,926.74
  5. Step 5: Solve for x
    x = 3,894,811,926.74/64,896.86
  6. Step 6: Final answer
    x = 60,015.42

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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.