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Finding the Fourth Proportional to 124,749, 172,157.40 and 68,164.02

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Solution

The fourth proportional to 124,749, 172,157.40 and 68,164.02 is: 94,068.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,749 : 172,157.40 = 68,164.02 : x
  2. Step 2: Convert to fraction form
    124,749/172,157.40 = 68,164.02/x
  3. Step 3: Cross multiply
    124,749x = 172,157.40 × 68,164.02
  4. Step 4: Simplify right side
    124,749x = 11,734,940,456.75
  5. Step 5: Solve for x
    x = 11,734,940,456.75/124,749
  6. Step 6: Final answer
    x = 94,068.41

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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.