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Finding the Fourth Proportional to 93,085.04, 128,478.84 and 55,380.80

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Solution

The fourth proportional to 93,085.04, 128,478.84 and 55,380.80 is: 76,438.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,085.04 : 128,478.84 = 55,380.80 : x
  2. Step 2: Convert to fraction form
    93,085.04/128,478.84 = 55,380.80/x
  3. Step 3: Cross multiply
    93,085.04x = 128,478.84 × 55,380.80
  4. Step 4: Simplify right side
    93,085.04x = 7,115,260,942.27
  5. Step 5: Solve for x
    x = 7,115,260,942.27/93,085.04
  6. Step 6: Final answer
    x = 76,438.29

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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.