Home / 128,666.16-177,611.40-83,383.01

Finding the Fourth Proportional to 128,666.16, 177,611.40 and 83,383.01

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Solution

The fourth proportional to 128,666.16, 177,611.40 and 83,383.01 is: 115,102.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,666.16 : 177,611.40 = 83,383.01 : x
  2. Step 2: Convert to fraction form
    128,666.16/177,611.40 = 83,383.01/x
  3. Step 3: Cross multiply
    128,666.16x = 177,611.40 × 83,383.01
  4. Step 4: Simplify right side
    128,666.16x = 14,809,773,142.31
  5. Step 5: Solve for x
    x = 14,809,773,142.31/128,666.16
  6. Step 6: Final answer
    x = 115,102.32

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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.