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Finding the Fourth Proportional to 70,851.48, 106,270.74 and 21,603.48

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Solution

The fourth proportional to 70,851.48, 106,270.74 and 21,603.48 is: 32,403.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,851.48 : 106,270.74 = 21,603.48 : x
  2. Step 2: Convert to fraction form
    70,851.48/106,270.74 = 21,603.48/x
  3. Step 3: Cross multiply
    70,851.48x = 106,270.74 × 21,603.48
  4. Step 4: Simplify right side
    70,851.48x = 2,295,817,806.18
  5. Step 5: Solve for x
    x = 2,295,817,806.18/70,851.48
  6. Step 6: Final answer
    x = 32,403.24

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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.