Home / 85,683.80-128,561.25-52,405.04

Finding the Fourth Proportional to 85,683.80, 128,561.25 and 52,405.04

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Solution

The fourth proportional to 85,683.80, 128,561.25 and 52,405.04 is: 78,629.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,683.80 : 128,561.25 = 52,405.04 : x
  2. Step 2: Convert to fraction form
    85,683.80/128,561.25 = 52,405.04/x
  3. Step 3: Cross multiply
    85,683.80x = 128,561.25 × 52,405.04
  4. Step 4: Simplify right side
    85,683.80x = 6,737,257,448.70
  5. Step 5: Solve for x
    x = 6,737,257,448.70/85,683.80
  6. Step 6: Final answer
    x = 78,629.30

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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.