Home / 140,050.08-210,078-78,114.72

Finding the Fourth Proportional to 140,050.08, 210,078 and 78,114.72

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Solution

The fourth proportional to 140,050.08, 210,078 and 78,114.72 is: 117,173.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,050.08 : 210,078 = 78,114.72 : x
  2. Step 2: Convert to fraction form
    140,050.08/210,078 = 78,114.72/x
  3. Step 3: Cross multiply
    140,050.08x = 210,078 × 78,114.72
  4. Step 4: Simplify right side
    140,050.08x = 16,410,184,148.16
  5. Step 5: Solve for x
    x = 16,410,184,148.16/140,050.08
  6. Step 6: Final answer
    x = 117,173.69

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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.