Home / 100,880.10-139,213.89-55,555.74

Finding the Fourth Proportional to 100,880.10, 139,213.89 and 55,555.74

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Solution

The fourth proportional to 100,880.10, 139,213.89 and 55,555.74 is: 76,666.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,880.10 : 139,213.89 = 55,555.74 : x
  2. Step 2: Convert to fraction form
    100,880.10/139,213.89 = 55,555.74/x
  3. Step 3: Cross multiply
    100,880.10x = 139,213.89 × 55,555.74
  4. Step 4: Simplify right side
    100,880.10x = 7,734,130,677.23
  5. Step 5: Solve for x
    x = 7,734,130,677.23/100,880.10
  6. Step 6: Final answer
    x = 76,666.56

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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.