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Finding the Fourth Proportional to 93,420, 128,977.92 and 59,944.32

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Solution

The fourth proportional to 93,420, 128,977.92 and 59,944.32 is: 82,760.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,420 : 128,977.92 = 59,944.32 : x
  2. Step 2: Convert to fraction form
    93,420/128,977.92 = 59,944.32/x
  3. Step 3: Cross multiply
    93,420x = 128,977.92 × 59,944.32
  4. Step 4: Simplify right side
    93,420x = 7,731,493,709.41
  5. Step 5: Solve for x
    x = 7,731,493,709.41/93,420
  6. Step 6: Final answer
    x = 82,760.58

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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.