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Finding the Fourth Proportional to 61,805.80, 86,724.95 and 61,805.80

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Solution

The fourth proportional to 61,805.80, 86,724.95 and 61,805.80 is: 86,724.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,805.80 : 86,724.95 = 61,805.80 : x
  2. Step 2: Convert to fraction form
    61,805.80/86,724.95 = 61,805.80/x
  3. Step 3: Cross multiply
    61,805.80x = 86,724.95 × 61,805.80
  4. Step 4: Simplify right side
    61,805.80x = 5,360,104,914.71
  5. Step 5: Solve for x
    x = 5,360,104,914.71/61,805.80
  6. Step 6: Final answer
    x = 86,724.95

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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.