Home / 128,339.47-177,103.33-70,975.05

Finding the Fourth Proportional to 128,339.47, 177,103.33 and 70,975.05

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Solution

The fourth proportional to 128,339.47, 177,103.33 and 70,975.05 is: 97,942.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,339.47 : 177,103.33 = 70,975.05 : x
  2. Step 2: Convert to fraction form
    128,339.47/177,103.33 = 70,975.05/x
  3. Step 3: Cross multiply
    128,339.47x = 177,103.33 × 70,975.05
  4. Step 4: Simplify right side
    128,339.47x = 12,569,917,701.92
  5. Step 5: Solve for x
    x = 12,569,917,701.92/128,339.47
  6. Step 6: Final answer
    x = 97,942.73

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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.