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Finding the Fourth Proportional to 123,413.70, 185,120.55 and 70,779.90

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Solution

The fourth proportional to 123,413.70, 185,120.55 and 70,779.90 is: 106,169.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,413.70 : 185,120.55 = 70,779.90 : x
  2. Step 2: Convert to fraction form
    123,413.70/185,120.55 = 70,779.90/x
  3. Step 3: Cross multiply
    123,413.70x = 185,120.55 × 70,779.90
  4. Step 4: Simplify right side
    123,413.70x = 13,102,814,016.95
  5. Step 5: Solve for x
    x = 13,102,814,016.95/123,413.70
  6. Step 6: Final answer
    x = 106,169.85

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1.5x scale

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.