Home / 258,708,123.20-388,116,098.40-86,238,516.80

Finding the Fourth Proportional to 258,708,123.20, 388,116,098.40 and 86,238,516.80

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Solution

The fourth proportional to 258,708,123.20, 388,116,098.40 and 86,238,516.80 is: 129,375,746.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,708,123.20 : 388,116,098.40 = 86,238,516.80 : x
  2. Step 2: Convert to fraction form
    258,708,123.20/388,116,098.40 = 86,238,516.80/x
  3. Step 3: Cross multiply
    258,708,123.20x = 388,116,098.40 × 86,238,516.80
  4. Step 4: Simplify right side
    258,708,123.20x = 33,470,556,672,218,848
  5. Step 5: Solve for x
    x = 33,470,556,672,218,848/258,708,123.20
  6. Step 6: Final answer
    x = 129,375,746.92

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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.