Home / 74,465.60-111,374.40-66,624.80

Finding the Fourth Proportional to 74,465.60, 111,374.40 and 66,624.80

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Solution

The fourth proportional to 74,465.60, 111,374.40 and 66,624.80 is: 99,647.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,465.60 : 111,374.40 = 66,624.80 : x
  2. Step 2: Convert to fraction form
    74,465.60/111,374.40 = 66,624.80/x
  3. Step 3: Cross multiply
    74,465.60x = 111,374.40 × 66,624.80
  4. Step 4: Simplify right side
    74,465.60x = 7,420,297,125.12
  5. Step 5: Solve for x
    x = 7,420,297,125.12/74,465.60
  6. Step 6: Final answer
    x = 99,647.32

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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.