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Finding the Fourth Proportional to 125,712.16, 173,485.72 and 68,354.74

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Solution

The fourth proportional to 125,712.16, 173,485.72 and 68,354.74 is: 94,331.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,712.16 : 173,485.72 = 68,354.74 : x
  2. Step 2: Convert to fraction form
    125,712.16/173,485.72 = 68,354.74/x
  3. Step 3: Cross multiply
    125,712.16x = 173,485.72 × 68,354.74
  4. Step 4: Simplify right side
    125,712.16x = 11,858,571,284.31
  5. Step 5: Solve for x
    x = 11,858,571,284.31/125,712.16
  6. Step 6: Final answer
    x = 94,331.14

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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.