Home / 72,919.63-100,629.15-39,385.63

Finding the Fourth Proportional to 72,919.63, 100,629.15 and 39,385.63

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Solution

The fourth proportional to 72,919.63, 100,629.15 and 39,385.63 is: 54,352.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,919.63 : 100,629.15 = 39,385.63 : x
  2. Step 2: Convert to fraction form
    72,919.63/100,629.15 = 39,385.63/x
  3. Step 3: Cross multiply
    72,919.63x = 100,629.15 × 39,385.63
  4. Step 4: Simplify right side
    72,919.63x = 3,963,341,965.97
  5. Step 5: Solve for x
    x = 3,963,341,965.97/72,919.63
  6. Step 6: Final answer
    x = 54,352.20

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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.