Home / 338,939.10-508,411.55-86,219.81

Finding the Fourth Proportional to 338,939.10, 508,411.55 and 86,219.81

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Solution

The fourth proportional to 338,939.10, 508,411.55 and 86,219.81 is: 129,330.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,939.10 : 508,411.55 = 86,219.81 : x
  2. Step 2: Convert to fraction form
    338,939.10/508,411.55 = 86,219.81/x
  3. Step 3: Cross multiply
    338,939.10x = 508,411.55 × 86,219.81
  4. Step 4: Simplify right side
    338,939.10x = 43,835,146,822.84
  5. Step 5: Solve for x
    x = 43,835,146,822.84/338,939.10
  6. Step 6: Final answer
    x = 129,330.45

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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.