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Finding the Fourth Proportional to 60,120.63, 90,180.95 and 20,678.09

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Solution

The fourth proportional to 60,120.63, 90,180.95 and 20,678.09 is: 31,017.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,120.63 : 90,180.95 = 20,678.09 : x
  2. Step 2: Convert to fraction form
    60,120.63/90,180.95 = 20,678.09/x
  3. Step 3: Cross multiply
    60,120.63x = 90,180.95 × 20,678.09
  4. Step 4: Simplify right side
    60,120.63x = 1,864,769,246.09
  5. Step 5: Solve for x
    x = 1,864,769,246.09/60,120.63
  6. Step 6: Final answer
    x = 31,017.13

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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.