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Finding the Fourth Proportional to 39,815.20, 59,722.80 and 35,514.40

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Solution

The fourth proportional to 39,815.20, 59,722.80 and 35,514.40 is: 53,271.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,815.20 : 59,722.80 = 35,514.40 : x
  2. Step 2: Convert to fraction form
    39,815.20/59,722.80 = 35,514.40/x
  3. Step 3: Cross multiply
    39,815.20x = 59,722.80 × 35,514.40
  4. Step 4: Simplify right side
    39,815.20x = 2,121,019,408.32
  5. Step 5: Solve for x
    x = 2,121,019,408.32/39,815.20
  6. Step 6: Final answer
    x = 53,271.60

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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.