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Finding the Fourth Proportional to 125,830.80, 188,964.90 and 121,894.20

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Solution

The fourth proportional to 125,830.80, 188,964.90 and 121,894.20 is: 183,053.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,830.80 : 188,964.90 = 121,894.20 : x
  2. Step 2: Convert to fraction form
    125,830.80/188,964.90 = 121,894.20/x
  3. Step 3: Cross multiply
    125,830.80x = 188,964.90 × 121,894.20
  4. Step 4: Simplify right side
    125,830.80x = 23,033,725,313.58
  5. Step 5: Solve for x
    x = 23,033,725,313.58/125,830.80
  6. Step 6: Final answer
    x = 183,053.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.