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Finding the Fourth Proportional to 101,782.90, 140,461.25 and 56,463.85

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Solution

The fourth proportional to 101,782.90, 140,461.25 and 56,463.85 is: 77,920.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,782.90 : 140,461.25 = 56,463.85 : x
  2. Step 2: Convert to fraction form
    101,782.90/140,461.25 = 56,463.85/x
  3. Step 3: Cross multiply
    101,782.90x = 140,461.25 × 56,463.85
  4. Step 4: Simplify right side
    101,782.90x = 7,930,982,668.49
  5. Step 5: Solve for x
    x = 7,930,982,668.49/101,782.90
  6. Step 6: Final answer
    x = 77,920.58

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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.