Home / 100,947.63-139,310.60-56,238.51

Finding the Fourth Proportional to 100,947.63, 139,310.60 and 56,238.51

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Solution

The fourth proportional to 100,947.63, 139,310.60 and 56,238.51 is: 77,610.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,947.63 : 139,310.60 = 56,238.51 : x
  2. Step 2: Convert to fraction form
    100,947.63/139,310.60 = 56,238.51/x
  3. Step 3: Cross multiply
    100,947.63x = 139,310.60 × 56,238.51
  4. Step 4: Simplify right side
    100,947.63x = 7,834,620,015.25
  5. Step 5: Solve for x
    x = 7,834,620,015.25/100,947.63
  6. Step 6: Final answer
    x = 77,610.74

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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.