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Finding the Fourth Proportional to 65,664, 98,430.40 and 60,721.44

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Solution

The fourth proportional to 65,664, 98,430.40 and 60,721.44 is: 91,021.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,664 : 98,430.40 = 60,721.44 : x
  2. Step 2: Convert to fraction form
    65,664/98,430.40 = 60,721.44/x
  3. Step 3: Cross multiply
    65,664x = 98,430.40 × 60,721.44
  4. Step 4: Simplify right side
    65,664x = 5,976,835,627.78
  5. Step 5: Solve for x
    x = 5,976,835,627.78/65,664
  6. Step 6: Final answer
    x = 91,021.50

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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.