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Finding the Fourth Proportional to 82,886.40, 124,329.60 and 20,556.90

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Solution

The fourth proportional to 82,886.40, 124,329.60 and 20,556.90 is: 30,835.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,886.40 : 124,329.60 = 20,556.90 : x
  2. Step 2: Convert to fraction form
    82,886.40/124,329.60 = 20,556.90/x
  3. Step 3: Cross multiply
    82,886.40x = 124,329.60 × 20,556.90
  4. Step 4: Simplify right side
    82,886.40x = 2,555,831,154.24
  5. Step 5: Solve for x
    x = 2,555,831,154.24/82,886.40
  6. Step 6: Final answer
    x = 30,835.35

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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.