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Finding the Fourth Proportional to 116,538.80, 174,894.60 and 77,082.80

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Solution

The fourth proportional to 116,538.80, 174,894.60 and 77,082.80 is: 115,681.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,538.80 : 174,894.60 = 77,082.80 : x
  2. Step 2: Convert to fraction form
    116,538.80/174,894.60 = 77,082.80/x
  3. Step 3: Cross multiply
    116,538.80x = 174,894.60 × 77,082.80
  4. Step 4: Simplify right side
    116,538.80x = 13,481,365,472.88
  5. Step 5: Solve for x
    x = 13,481,365,472.88/116,538.80
  6. Step 6: Final answer
    x = 115,681.35

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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.