Home / 85,609.20-128,413.80-26,439.60

Finding the Fourth Proportional to 85,609.20, 128,413.80 and 26,439.60

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Solution

The fourth proportional to 85,609.20, 128,413.80 and 26,439.60 is: 39,659.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,609.20 : 128,413.80 = 26,439.60 : x
  2. Step 2: Convert to fraction form
    85,609.20/128,413.80 = 26,439.60/x
  3. Step 3: Cross multiply
    85,609.20x = 128,413.80 × 26,439.60
  4. Step 4: Simplify right side
    85,609.20x = 3,395,209,506.48
  5. Step 5: Solve for x
    x = 3,395,209,506.48/85,609.20
  6. Step 6: Final answer
    x = 39,659.40

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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.