Home / 100,114.97-138,160.47-57,099.41

Finding the Fourth Proportional to 100,114.97, 138,160.47 and 57,099.41

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Solution

The fourth proportional to 100,114.97, 138,160.47 and 57,099.41 is: 78,798.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,114.97 : 138,160.47 = 57,099.41 : x
  2. Step 2: Convert to fraction form
    100,114.97/138,160.47 = 57,099.41/x
  3. Step 3: Cross multiply
    100,114.97x = 138,160.47 × 57,099.41
  4. Step 4: Simplify right side
    100,114.97x = 7,888,880,631.52
  5. Step 5: Solve for x
    x = 7,888,880,631.52/100,114.97
  6. Step 6: Final answer
    x = 78,798.22

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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.