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Finding the Fourth Proportional to 64,978.77, 89,652.90 and 39,463.77

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Solution

The fourth proportional to 64,978.77, 89,652.90 and 39,463.77 is: 54,449.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,978.77 : 89,652.90 = 39,463.77 : x
  2. Step 2: Convert to fraction form
    64,978.77/89,652.90 = 39,463.77/x
  3. Step 3: Cross multiply
    64,978.77x = 89,652.90 × 39,463.77
  4. Step 4: Simplify right side
    64,978.77x = 3,538,041,425.43
  5. Step 5: Solve for x
    x = 3,538,041,425.43/64,978.77
  6. Step 6: Final answer
    x = 54,449.19

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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.