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Finding the Fourth Proportional to 65,699.70, 98,424.93 and 38,989.24

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Solution

The fourth proportional to 65,699.70, 98,424.93 and 38,989.24 is: 58,409.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,699.70 : 98,424.93 = 38,989.24 : x
  2. Step 2: Convert to fraction form
    65,699.70/98,424.93 = 38,989.24/x
  3. Step 3: Cross multiply
    65,699.70x = 98,424.93 × 38,989.24
  4. Step 4: Simplify right side
    65,699.70x = 3,837,512,971.69
  5. Step 5: Solve for x
    x = 3,837,512,971.69/65,699.70
  6. Step 6: Final answer
    x = 58,409.90

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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.