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Finding the Fourth Proportional to 65,721.60, 92,185.20 and 65,721.60

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Solution

The fourth proportional to 65,721.60, 92,185.20 and 65,721.60 is: 92,185.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,721.60 : 92,185.20 = 65,721.60 : x
  2. Step 2: Convert to fraction form
    65,721.60/92,185.20 = 65,721.60/x
  3. Step 3: Cross multiply
    65,721.60x = 92,185.20 × 65,721.60
  4. Step 4: Simplify right side
    65,721.60x = 6,058,558,840.32
  5. Step 5: Solve for x
    x = 6,058,558,840.32/65,721.60
  6. Step 6: Final answer
    x = 92,185.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.