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Finding the Fourth Proportional to 60,610.34, 90,921.39 and 20,657.50

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Solution

The fourth proportional to 60,610.34, 90,921.39 and 20,657.50 is: 30,988.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,610.34 : 90,921.39 = 20,657.50 : x
  2. Step 2: Convert to fraction form
    60,610.34/90,921.39 = 20,657.50/x
  3. Step 3: Cross multiply
    60,610.34x = 90,921.39 × 20,657.50
  4. Step 4: Simplify right side
    60,610.34x = 1,878,208,309.16
  5. Step 5: Solve for x
    x = 1,878,208,309.16/60,610.34
  6. Step 6: Final answer
    x = 30,988.25

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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.