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Finding the Fourth Proportional to 129,854.80, 194,782.20 and 46,718.80

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Solution

The fourth proportional to 129,854.80, 194,782.20 and 46,718.80 is: 70,078.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,854.80 : 194,782.20 = 46,718.80 : x
  2. Step 2: Convert to fraction form
    129,854.80/194,782.20 = 46,718.80/x
  3. Step 3: Cross multiply
    129,854.80x = 194,782.20 × 46,718.80
  4. Step 4: Simplify right side
    129,854.80x = 9,099,990,645.36
  5. Step 5: Solve for x
    x = 9,099,990,645.36/129,854.80
  6. Step 6: Final answer
    x = 70,078.20

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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.