Home / 128,413.40-177,323.10-80,749.40

Finding the Fourth Proportional to 128,413.40, 177,323.10 and 80,749.40

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Solution

The fourth proportional to 128,413.40, 177,323.10 and 80,749.40 is: 111,504.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,413.40 : 177,323.10 = 80,749.40 : x
  2. Step 2: Convert to fraction form
    128,413.40/177,323.10 = 80,749.40/x
  3. Step 3: Cross multiply
    128,413.40x = 177,323.10 × 80,749.40
  4. Step 4: Simplify right side
    128,413.40x = 14,318,733,931.14
  5. Step 5: Solve for x
    x = 14,318,733,931.14/128,413.40
  6. Step 6: Final answer
    x = 111,504.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.