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Finding the Fourth Proportional to 93,205.50, 128,635.74 and 55,479.75

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Solution

The fourth proportional to 93,205.50, 128,635.74 and 55,479.75 is: 76,569.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,205.50 : 128,635.74 = 55,479.75 : x
  2. Step 2: Convert to fraction form
    93,205.50/128,635.74 = 55,479.75/x
  3. Step 3: Cross multiply
    93,205.50x = 128,635.74 × 55,479.75
  4. Step 4: Simplify right side
    93,205.50x = 7,136,678,696.27
  5. Step 5: Solve for x
    x = 7,136,678,696.27/93,205.50
  6. Step 6: Final answer
    x = 76,569.29

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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.