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Finding the Fourth Proportional to 28,977,978.44, 43,395,223.14 and 21,283,377.10

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Solution

The fourth proportional to 28,977,978.44, 43,395,223.14 and 21,283,377.10 is: 31,872,371.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,977,978.44 : 43,395,223.14 = 21,283,377.10 : x
  2. Step 2: Convert to fraction form
    28,977,978.44/43,395,223.14 = 21,283,377.10/x
  3. Step 3: Cross multiply
    28,977,978.44x = 43,395,223.14 × 21,283,377.10
  4. Step 4: Simplify right side
    28,977,978.44x = 923,596,898,210,290
  5. Step 5: Solve for x
    x = 923,596,898,210,290/28,977,978.44
  6. Step 6: Final answer
    x = 31,872,371.64

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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.