Home / 66,618.76-99,928.32-19,870.60

Finding the Fourth Proportional to 66,618.76, 99,928.32 and 19,870.60

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Solution

The fourth proportional to 66,618.76, 99,928.32 and 19,870.60 is: 29,805.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,618.76 : 99,928.32 = 19,870.60 : x
  2. Step 2: Convert to fraction form
    66,618.76/99,928.32 = 19,870.60/x
  3. Step 3: Cross multiply
    66,618.76x = 99,928.32 × 19,870.60
  4. Step 4: Simplify right side
    66,618.76x = 1,985,635,675.39
  5. Step 5: Solve for x
    x = 1,985,635,675.39/66,618.76
  6. Step 6: Final answer
    x = 29,805.95

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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.