Home / 128,820.66-177,774.36-77,826.30

Finding the Fourth Proportional to 128,820.66, 177,774.36 and 77,826.30

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Solution

The fourth proportional to 128,820.66, 177,774.36 and 77,826.30 is: 107,401.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,820.66 : 177,774.36 = 77,826.30 : x
  2. Step 2: Convert to fraction form
    128,820.66/177,774.36 = 77,826.30/x
  3. Step 3: Cross multiply
    128,820.66x = 177,774.36 × 77,826.30
  4. Step 4: Simplify right side
    128,820.66x = 13,835,520,673.67
  5. Step 5: Solve for x
    x = 13,835,520,673.67/128,820.66
  6. Step 6: Final answer
    x = 107,401.41

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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.