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Finding the Fourth Proportional to 79,276.80, 118,886.40 and 39,820.80

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Solution

The fourth proportional to 79,276.80, 118,886.40 and 39,820.80 is: 59,716.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,276.80 : 118,886.40 = 39,820.80 : x
  2. Step 2: Convert to fraction form
    79,276.80/118,886.40 = 39,820.80/x
  3. Step 3: Cross multiply
    79,276.80x = 118,886.40 × 39,820.80
  4. Step 4: Simplify right side
    79,276.80x = 4,734,151,557.12
  5. Step 5: Solve for x
    x = 4,734,151,557.12/79,276.80
  6. Step 6: Final answer
    x = 59,716.73

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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.