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Finding the Fourth Proportional to 125,110.50, 172,653.71 and 74,809.50

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Solution

The fourth proportional to 125,110.50, 172,653.71 and 74,809.50 is: 103,237.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,110.50 : 172,653.71 = 74,809.50 : x
  2. Step 2: Convert to fraction form
    125,110.50/172,653.71 = 74,809.50/x
  3. Step 3: Cross multiply
    125,110.50x = 172,653.71 × 74,809.50
  4. Step 4: Simplify right side
    125,110.50x = 12,916,137,344.20
  5. Step 5: Solve for x
    x = 12,916,137,344.20/125,110.50
  6. Step 6: Final answer
    x = 103,237.84

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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.