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Finding the Fourth Proportional to 101,521.78, 140,163.80 and 65,239.46

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Solution

The fourth proportional to 101,521.78, 140,163.80 and 65,239.46 is: 90,071.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,521.78 : 140,163.80 = 65,239.46 : x
  2. Step 2: Convert to fraction form
    101,521.78/140,163.80 = 65,239.46/x
  3. Step 3: Cross multiply
    101,521.78x = 140,163.80 × 65,239.46
  4. Step 4: Simplify right side
    101,521.78x = 9,144,210,623.55
  5. Step 5: Solve for x
    x = 9,144,210,623.55/101,521.78
  6. Step 6: Final answer
    x = 90,071.42

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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.