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Finding the Fourth Proportional to 60,386.20, 90,579.30 and 20,930.20

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Solution

The fourth proportional to 60,386.20, 90,579.30 and 20,930.20 is: 31,395.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,386.20 : 90,579.30 = 20,930.20 : x
  2. Step 2: Convert to fraction form
    60,386.20/90,579.30 = 20,930.20/x
  3. Step 3: Cross multiply
    60,386.20x = 90,579.30 × 20,930.20
  4. Step 4: Simplify right side
    60,386.20x = 1,895,842,864.86
  5. Step 5: Solve for x
    x = 1,895,842,864.86/60,386.20
  6. Step 6: Final answer
    x = 31,395.30

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Similar ratio
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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.