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Finding the Fourth Proportional to 124,779, 172,194.80 and 68,190.32

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Solution

The fourth proportional to 124,779, 172,194.80 and 68,190.32 is: 94,102.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,779 : 172,194.80 = 68,190.32 : x
  2. Step 2: Convert to fraction form
    124,779/172,194.80 = 68,190.32/x
  3. Step 3: Cross multiply
    124,779x = 172,194.80 × 68,190.32
  4. Step 4: Simplify right side
    124,779x = 11,742,018,514.34
  5. Step 5: Solve for x
    x = 11,742,018,514.34/124,779
  6. Step 6: Final answer
    x = 94,102.52

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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.