Home / 128,617.63-177,493.07-71,258.76

Finding the Fourth Proportional to 128,617.63, 177,493.07 and 71,258.76

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Solution

The fourth proportional to 128,617.63, 177,493.07 and 71,258.76 is: 98,337.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,617.63 : 177,493.07 = 71,258.76 : x
  2. Step 2: Convert to fraction form
    128,617.63/177,493.07 = 71,258.76/x
  3. Step 3: Cross multiply
    128,617.63x = 177,493.07 × 71,258.76
  4. Step 4: Simplify right side
    128,617.63x = 12,647,936,254.94
  5. Step 5: Solve for x
    x = 12,647,936,254.94/128,617.63
  6. Step 6: Final answer
    x = 98,337.50

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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.