Home / 138,467.21-191,085.93-78,026.27

Finding the Fourth Proportional to 138,467.21, 191,085.93 and 78,026.27

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Solution

The fourth proportional to 138,467.21, 191,085.93 and 78,026.27 is: 107,676.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,467.21 : 191,085.93 = 78,026.27 : x
  2. Step 2: Convert to fraction form
    138,467.21/191,085.93 = 78,026.27/x
  3. Step 3: Cross multiply
    138,467.21x = 191,085.93 × 78,026.27
  4. Step 4: Simplify right side
    138,467.21x = 14,909,721,411.95
  5. Step 5: Solve for x
    x = 14,909,721,411.95/138,467.21
  6. Step 6: Final answer
    x = 107,676.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.