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Finding the Fourth Proportional to 103,634.90, 155,452.35 and 70,370.90

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Solution

The fourth proportional to 103,634.90, 155,452.35 and 70,370.90 is: 105,556.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,634.90 : 155,452.35 = 70,370.90 : x
  2. Step 2: Convert to fraction form
    103,634.90/155,452.35 = 70,370.90/x
  3. Step 3: Cross multiply
    103,634.90x = 155,452.35 × 70,370.90
  4. Step 4: Simplify right side
    103,634.90x = 10,939,321,776.62
  5. Step 5: Solve for x
    x = 10,939,321,776.62/103,634.90
  6. Step 6: Final answer
    x = 105,556.35

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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.