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Finding the Fourth Proportional to 128,397.54, 192,491.94 and 53,573.45

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Solution

The fourth proportional to 128,397.54, 192,491.94 and 53,573.45 is: 80,316.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,397.54 : 192,491.94 = 53,573.45 : x
  2. Step 2: Convert to fraction form
    128,397.54/192,491.94 = 53,573.45/x
  3. Step 3: Cross multiply
    128,397.54x = 192,491.94 × 53,573.45
  4. Step 4: Simplify right side
    128,397.54x = 10,312,457,322.99
  5. Step 5: Solve for x
    x = 10,312,457,322.99/128,397.54
  6. Step 6: Final answer
    x = 80,316.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.