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Finding the Fourth Proportional to 66,028.80, 98,913.60 and 39,655.68

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Solution

The fourth proportional to 66,028.80, 98,913.60 and 39,655.68 is: 59,405.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,028.80 : 98,913.60 = 39,655.68 : x
  2. Step 2: Convert to fraction form
    66,028.80/98,913.60 = 39,655.68/x
  3. Step 3: Cross multiply
    66,028.80x = 98,913.60 × 39,655.68
  4. Step 4: Simplify right side
    66,028.80x = 3,922,486,069.25
  5. Step 5: Solve for x
    x = 3,922,486,069.25/66,028.80
  6. Step 6: Final answer
    x = 59,405.68

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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.