Home / 128,725.68-177,455.30-90,368.44

Finding the Fourth Proportional to 128,725.68, 177,455.30 and 90,368.44

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Solution

The fourth proportional to 128,725.68, 177,455.30 and 90,368.44 is: 124,577.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,725.68 : 177,455.30 = 90,368.44 : x
  2. Step 2: Convert to fraction form
    128,725.68/177,455.30 = 90,368.44/x
  3. Step 3: Cross multiply
    128,725.68x = 177,455.30 × 90,368.44
  4. Step 4: Simplify right side
    128,725.68x = 16,036,358,630.73
  5. Step 5: Solve for x
    x = 16,036,358,630.73/128,725.68
  6. Step 6: Final answer
    x = 124,577.77

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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.