Home / 128,899,879.38-193,347,921.83-31,855,581.63

Finding the Fourth Proportional to 128,899,879.38, 193,347,921.83 and 31,855,581.63

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Solution

The fourth proportional to 128,899,879.38, 193,347,921.83 and 31,855,581.63 is: 47,782,903.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,899,879.38 : 193,347,921.83 = 31,855,581.63 : x
  2. Step 2: Convert to fraction form
    128,899,879.38/193,347,921.83 = 31,855,581.63/x
  3. Step 3: Cross multiply
    128,899,879.38x = 193,347,921.83 × 31,855,581.63
  4. Step 4: Simplify right side
    128,899,879.38x = 6,159,210,506,687,145
  5. Step 5: Solve for x
    x = 6,159,210,506,687,145/128,899,879.38
  6. Step 6: Final answer
    x = 47,782,903.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.