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Finding the Fourth Proportional to 60,298.40, 90,461.39 and 20,855.48

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Solution

The fourth proportional to 60,298.40, 90,461.39 and 20,855.48 is: 31,287.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,298.40 : 90,461.39 = 20,855.48 : x
  2. Step 2: Convert to fraction form
    60,298.40/90,461.39 = 20,855.48/x
  3. Step 3: Cross multiply
    60,298.40x = 90,461.39 × 20,855.48
  4. Step 4: Simplify right side
    60,298.40x = 1,886,615,153.33
  5. Step 5: Solve for x
    x = 1,886,615,153.33/60,298.40
  6. Step 6: Final answer
    x = 31,287.98

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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.