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Finding the Fourth Proportional to 125,866.80, 188,362.80 and 86,500.80

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Solution

The fourth proportional to 125,866.80, 188,362.80 and 86,500.80 is: 129,450.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,866.80 : 188,362.80 = 86,500.80 : x
  2. Step 2: Convert to fraction form
    125,866.80/188,362.80 = 86,500.80/x
  3. Step 3: Cross multiply
    125,866.80x = 188,362.80 × 86,500.80
  4. Step 4: Simplify right side
    125,866.80x = 16,293,532,890.24
  5. Step 5: Solve for x
    x = 16,293,532,890.24/125,866.80
  6. Step 6: Final answer
    x = 129,450.60

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1.5x scale

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.