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Finding the Fourth Proportional to 111,721.93, 154,160.21 and 65,754.23

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Solution

The fourth proportional to 111,721.93, 154,160.21 and 65,754.23 is: 90,731.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,721.93 : 154,160.21 = 65,754.23 : x
  2. Step 2: Convert to fraction form
    111,721.93/154,160.21 = 65,754.23/x
  3. Step 3: Cross multiply
    111,721.93x = 154,160.21 × 65,754.23
  4. Step 4: Simplify right side
    111,721.93x = 10,136,685,298.77
  5. Step 5: Solve for x
    x = 10,136,685,298.77/111,721.93
  6. Step 6: Final answer
    x = 90,731.39

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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.