Home / 191,018.54-263,686.40-128,942.57

Finding the Fourth Proportional to 191,018.54, 263,686.40 and 128,942.57

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Solution

The fourth proportional to 191,018.54, 263,686.40 and 128,942.57 is: 177,995.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,018.54 : 263,686.40 = 128,942.57 : x
  2. Step 2: Convert to fraction form
    191,018.54/263,686.40 = 128,942.57/x
  3. Step 3: Cross multiply
    191,018.54x = 263,686.40 × 128,942.57
  4. Step 4: Simplify right side
    191,018.54x = 34,000,403,313.39
  5. Step 5: Solve for x
    x = 34,000,403,313.39/191,018.54
  6. Step 6: Final answer
    x = 177,995.30

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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.