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Finding the Fourth Proportional to 74,847.60, 112,271.40 and 39,769.20

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Solution

The fourth proportional to 74,847.60, 112,271.40 and 39,769.20 is: 59,653.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,847.60 : 112,271.40 = 39,769.20 : x
  2. Step 2: Convert to fraction form
    74,847.60/112,271.40 = 39,769.20/x
  3. Step 3: Cross multiply
    74,847.60x = 112,271.40 × 39,769.20
  4. Step 4: Simplify right side
    74,847.60x = 4,464,943,760.88
  5. Step 5: Solve for x
    x = 4,464,943,760.88/74,847.60
  6. Step 6: Final answer
    x = 59,653.80

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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.