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Finding the Fourth Proportional to 72,921.56, 100,675.44 and 47,814.80

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Solution

The fourth proportional to 72,921.56, 100,675.44 and 47,814.80 is: 66,013.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,921.56 : 100,675.44 = 47,814.80 : x
  2. Step 2: Convert to fraction form
    72,921.56/100,675.44 = 47,814.80/x
  3. Step 3: Cross multiply
    72,921.56x = 100,675.44 × 47,814.80
  4. Step 4: Simplify right side
    72,921.56x = 4,813,776,028.51
  5. Step 5: Solve for x
    x = 4,813,776,028.51/72,921.56
  6. Step 6: Final answer
    x = 66,013.07

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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.