Home / 100,452.12-138,623.50-55,130.84

Finding the Fourth Proportional to 100,452.12, 138,623.50 and 55,130.84

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Solution

The fourth proportional to 100,452.12, 138,623.50 and 55,130.84 is: 76,080.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,452.12 : 138,623.50 = 55,130.84 : x
  2. Step 2: Convert to fraction form
    100,452.12/138,623.50 = 55,130.84/x
  3. Step 3: Cross multiply
    100,452.12x = 138,623.50 × 55,130.84
  4. Step 4: Simplify right side
    100,452.12x = 7,642,429,894.37
  5. Step 5: Solve for x
    x = 7,642,429,894.37/100,452.12
  6. Step 6: Final answer
    x = 76,080.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.