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Finding the Fourth Proportional to 124,969, 172,459.38 and 68,381.32

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Solution

The fourth proportional to 124,969, 172,459.38 and 68,381.32 is: 94,367.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,969 : 172,459.38 = 68,381.32 : x
  2. Step 2: Convert to fraction form
    124,969/172,459.38 = 68,381.32/x
  3. Step 3: Cross multiply
    124,969x = 172,459.38 × 68,381.32
  4. Step 4: Simplify right side
    124,969x = 11,793,000,050.78
  5. Step 5: Solve for x
    x = 11,793,000,050.78/124,969
  6. Step 6: Final answer
    x = 94,367.40

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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.