Home / 100,861.40-139,187.58-55,538.45

Finding the Fourth Proportional to 100,861.40, 139,187.58 and 55,538.45

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Solution

The fourth proportional to 100,861.40, 139,187.58 and 55,538.45 is: 76,642.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,861.40 : 139,187.58 = 55,538.45 : x
  2. Step 2: Convert to fraction form
    100,861.40/139,187.58 = 55,538.45/x
  3. Step 3: Cross multiply
    100,861.40x = 139,187.58 × 55,538.45
  4. Step 4: Simplify right side
    100,861.40x = 7,730,261,756.51
  5. Step 5: Solve for x
    x = 7,730,261,756.51/100,861.40
  6. Step 6: Final answer
    x = 76,642.42

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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.