Home / 258,810,649.56-388,219,406.58-86,287,518.36

Finding the Fourth Proportional to 258,810,649.56, 388,219,406.58 and 86,287,518.36

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Solution

The fourth proportional to 258,810,649.56, 388,219,406.58 and 86,287,518.36 is: 129,432,421.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,810,649.56 : 388,219,406.58 = 86,287,518.36 : x
  2. Step 2: Convert to fraction form
    258,810,649.56/388,219,406.58 = 86,287,518.36/x
  3. Step 3: Cross multiply
    258,810,649.56x = 388,219,406.58 × 86,287,518.36
  4. Step 4: Simplify right side
    258,810,649.56x = 33,498,489,172,980,052
  5. Step 5: Solve for x
    x = 33,498,489,172,980,052/258,810,649.56
  6. Step 6: Final answer
    x = 129,432,421.85

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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.