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Finding the Fourth Proportional to 125,418.54, 173,158.65 and 77,722.50

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Solution

The fourth proportional to 125,418.54, 173,158.65 and 77,722.50 is: 107,307.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,418.54 : 173,158.65 = 77,722.50 : x
  2. Step 2: Convert to fraction form
    125,418.54/173,158.65 = 77,722.50/x
  3. Step 3: Cross multiply
    125,418.54x = 173,158.65 × 77,722.50
  4. Step 4: Simplify right side
    125,418.54x = 13,458,323,174.63
  5. Step 5: Solve for x
    x = 13,458,323,174.63/125,418.54
  6. Step 6: Final answer
    x = 107,307.29

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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.