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Finding the Fourth Proportional to 100,556.80, 150,878.40 and 51,308.80

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Solution

The fourth proportional to 100,556.80, 150,878.40 and 51,308.80 is: 76,985.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,556.80 : 150,878.40 = 51,308.80 : x
  2. Step 2: Convert to fraction form
    100,556.80/150,878.40 = 51,308.80/x
  3. Step 3: Cross multiply
    100,556.80x = 150,878.40 × 51,308.80
  4. Step 4: Simplify right side
    100,556.80x = 7,741,389,649.92
  5. Step 5: Solve for x
    x = 7,741,389,649.92/100,556.80
  6. Step 6: Final answer
    x = 76,985.24

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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.