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Finding the Fourth Proportional to 60,120.54, 90,179.90 and 20,678.00

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Solution

The fourth proportional to 60,120.54, 90,179.90 and 20,678.00 is: 31,016.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,120.54 : 90,179.90 = 20,678.00 : x
  2. Step 2: Convert to fraction form
    60,120.54/90,179.90 = 20,678.00/x
  3. Step 3: Cross multiply
    60,120.54x = 90,179.90 × 20,678.00
  4. Step 4: Simplify right side
    60,120.54x = 1,864,739,495.45
  5. Step 5: Solve for x
    x = 1,864,739,495.45/60,120.54
  6. Step 6: Final answer
    x = 31,016.68

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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.