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Finding the Fourth Proportional to 120,805.70, 181,208.55 and 102,143.30

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Solution

The fourth proportional to 120,805.70, 181,208.55 and 102,143.30 is: 153,214.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,805.70 : 181,208.55 = 102,143.30 : x
  2. Step 2: Convert to fraction form
    120,805.70/181,208.55 = 102,143.30/x
  3. Step 3: Cross multiply
    120,805.70x = 181,208.55 × 102,143.30
  4. Step 4: Simplify right side
    120,805.70x = 18,509,239,285.22
  5. Step 5: Solve for x
    x = 18,509,239,285.22/120,805.70
  6. Step 6: Final answer
    x = 153,214.95

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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.