Home / 128,492.70-177,318.39-71,904.54

Finding the Fourth Proportional to 128,492.70, 177,318.39 and 71,904.54

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Solution

The fourth proportional to 128,492.70, 177,318.39 and 71,904.54 is: 99,227.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,492.70 : 177,318.39 = 71,904.54 : x
  2. Step 2: Convert to fraction form
    128,492.70/177,318.39 = 71,904.54/x
  3. Step 3: Cross multiply
    128,492.70x = 177,318.39 × 71,904.54
  4. Step 4: Simplify right side
    128,492.70x = 12,749,997,266.49
  5. Step 5: Solve for x
    x = 12,749,997,266.49/128,492.70
  6. Step 6: Final answer
    x = 99,227.41

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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.