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Finding the Fourth Proportional to 65,699.45, 98,424.56 and 38,988.99

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Solution

The fourth proportional to 65,699.45, 98,424.56 and 38,988.99 is: 58,409.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,699.45 : 98,424.56 = 38,988.99 : x
  2. Step 2: Convert to fraction form
    65,699.45/98,424.56 = 38,988.99/x
  3. Step 3: Cross multiply
    65,699.45x = 98,424.56 × 38,988.99
  4. Step 4: Simplify right side
    65,699.45x = 3,837,474,185.59
  5. Step 5: Solve for x
    x = 3,837,474,185.59/65,699.45
  6. Step 6: Final answer
    x = 58,409.53

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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.