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Finding the Fourth Proportional to 60,642.54, 90,930.98 and 20,649.60

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Solution

The fourth proportional to 60,642.54, 90,930.98 and 20,649.60 is: 30,963.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,642.54 : 90,930.98 = 20,649.60 : x
  2. Step 2: Convert to fraction form
    60,642.54/90,930.98 = 20,649.60/x
  3. Step 3: Cross multiply
    60,642.54x = 90,930.98 × 20,649.60
  4. Step 4: Simplify right side
    60,642.54x = 1,877,688,364.61
  5. Step 5: Solve for x
    x = 1,877,688,364.61/60,642.54
  6. Step 6: Final answer
    x = 30,963.22

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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.