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Finding the Fourth Proportional to 74,356.42, 102,217.28 and 63,970.21

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Solution

The fourth proportional to 74,356.42, 102,217.28 and 63,970.21 is: 87,939.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,356.42 : 102,217.28 = 63,970.21 : x
  2. Step 2: Convert to fraction form
    74,356.42/102,217.28 = 63,970.21/x
  3. Step 3: Cross multiply
    74,356.42x = 102,217.28 × 63,970.21
  4. Step 4: Simplify right side
    74,356.42x = 6,538,860,867.23
  5. Step 5: Solve for x
    x = 6,538,860,867.23/74,356.42
  6. Step 6: Final answer
    x = 87,939.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.