Home / 190,403.12-285,538.80-78,051.44

Finding the Fourth Proportional to 190,403.12, 285,538.80 and 78,051.44

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Solution

The fourth proportional to 190,403.12, 285,538.80 and 78,051.44 is: 117,050.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,403.12 : 285,538.80 = 78,051.44 : x
  2. Step 2: Convert to fraction form
    190,403.12/285,538.80 = 78,051.44/x
  3. Step 3: Cross multiply
    190,403.12x = 285,538.80 × 78,051.44
  4. Step 4: Simplify right side
    190,403.12x = 22,286,714,515.87
  5. Step 5: Solve for x
    x = 22,286,714,515.87/190,403.12
  6. Step 6: Final answer
    x = 117,050.15

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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.