Home / 128,733.72-177,466.34-90,376.44

Finding the Fourth Proportional to 128,733.72, 177,466.34 and 90,376.44

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Solution

The fourth proportional to 128,733.72, 177,466.34 and 90,376.44 is: 124,588.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,733.72 : 177,466.34 = 90,376.44 : x
  2. Step 2: Convert to fraction form
    128,733.72/177,466.34 = 90,376.44/x
  3. Step 3: Cross multiply
    128,733.72x = 177,466.34 × 90,376.44
  4. Step 4: Simplify right side
    128,733.72x = 16,038,776,029.03
  5. Step 5: Solve for x
    x = 16,038,776,029.03/128,733.72
  6. Step 6: Final answer
    x = 124,588.77

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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.