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Finding the Fourth Proportional to 61,803.55, 86,721.80 and 61,803.55

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Solution

The fourth proportional to 61,803.55, 86,721.80 and 61,803.55 is: 86,721.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,803.55 : 86,721.80 = 61,803.55 : x
  2. Step 2: Convert to fraction form
    61,803.55/86,721.80 = 61,803.55/x
  3. Step 3: Cross multiply
    61,803.55x = 86,721.80 × 61,803.55
  4. Step 4: Simplify right side
    61,803.55x = 5,359,715,102.39
  5. Step 5: Solve for x
    x = 5,359,715,102.39/61,803.55
  6. Step 6: Final answer
    x = 86,721.80

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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.