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Finding the Fourth Proportional to 128,641.44, 177,525.69 and 72,052.83

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Solution

The fourth proportional to 128,641.44, 177,525.69 and 72,052.83 is: 99,433.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,641.44 : 177,525.69 = 72,052.83 : x
  2. Step 2: Convert to fraction form
    128,641.44/177,525.69 = 72,052.83/x
  3. Step 3: Cross multiply
    128,641.44x = 177,525.69 × 72,052.83
  4. Step 4: Simplify right side
    128,641.44x = 12,791,228,362.20
  5. Step 5: Solve for x
    x = 12,791,228,362.20/128,641.44
  6. Step 6: Final answer
    x = 99,433.19

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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.