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Finding the Fourth Proportional to 101,907.72, 140,633.82 and 56,586.60

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Solution

The fourth proportional to 101,907.72, 140,633.82 and 56,586.60 is: 78,090.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,907.72 : 140,633.82 = 56,586.60 : x
  2. Step 2: Convert to fraction form
    101,907.72/140,633.82 = 56,586.60/x
  3. Step 3: Cross multiply
    101,907.72x = 140,633.82 × 56,586.60
  4. Step 4: Simplify right side
    101,907.72x = 7,957,989,718.81
  5. Step 5: Solve for x
    x = 7,957,989,718.81/101,907.72
  6. Step 6: Final answer
    x = 78,090.16

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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.