Home / 100,955.23-139,319.15-55,634.84

Finding the Fourth Proportional to 100,955.23, 139,319.15 and 55,634.84

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Solution

The fourth proportional to 100,955.23, 139,319.15 and 55,634.84 is: 76,776.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,955.23 : 139,319.15 = 55,634.84 : x
  2. Step 2: Convert to fraction form
    100,955.23/139,319.15 = 55,634.84/x
  3. Step 3: Cross multiply
    100,955.23x = 139,319.15 × 55,634.84
  4. Step 4: Simplify right side
    100,955.23x = 7,750,997,644.42
  5. Step 5: Solve for x
    x = 7,750,997,644.42/100,955.23
  6. Step 6: Final answer
    x = 76,776.59

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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.