Home / 121,772.38-168,038.64-67,321.28

Finding the Fourth Proportional to 121,772.38, 168,038.64 and 67,321.28

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Solution

The fourth proportional to 121,772.38, 168,038.64 and 67,321.28 is: 92,899.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,772.38 : 168,038.64 = 67,321.28 : x
  2. Step 2: Convert to fraction form
    121,772.38/168,038.64 = 67,321.28/x
  3. Step 3: Cross multiply
    121,772.38x = 168,038.64 × 67,321.28
  4. Step 4: Simplify right side
    121,772.38x = 11,312,576,334.26
  5. Step 5: Solve for x
    x = 11,312,576,334.26/121,772.38
  6. Step 6: Final answer
    x = 92,899.36

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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.