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Finding the Fourth Proportional to 64,720.76, 89,293.79 and 36,420.98

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Solution

The fourth proportional to 64,720.76, 89,293.79 and 36,420.98 is: 50,249.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,720.76 : 89,293.79 = 36,420.98 : x
  2. Step 2: Convert to fraction form
    64,720.76/89,293.79 = 36,420.98/x
  3. Step 3: Cross multiply
    64,720.76x = 89,293.79 × 36,420.98
  4. Step 4: Simplify right side
    64,720.76x = 3,252,166,711.14
  5. Step 5: Solve for x
    x = 3,252,166,711.14/64,720.76
  6. Step 6: Final answer
    x = 50,249.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.