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Finding the Fourth Proportional to 93,210.03, 128,635.14 and 54,991.80

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Solution

The fourth proportional to 93,210.03, 128,635.14 and 54,991.80 is: 75,891.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,210.03 : 128,635.14 = 54,991.80 : x
  2. Step 2: Convert to fraction form
    93,210.03/128,635.14 = 54,991.80/x
  3. Step 3: Cross multiply
    93,210.03x = 128,635.14 × 54,991.80
  4. Step 4: Simplify right side
    93,210.03x = 7,073,877,891.85
  5. Step 5: Solve for x
    x = 7,073,877,891.85/93,210.03
  6. Step 6: Final answer
    x = 75,891.81

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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.