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Finding the Fourth Proportional to 98,570.76, 136,073.06 and 57,729.20

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Solution

The fourth proportional to 98,570.76, 136,073.06 and 57,729.20 is: 79,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,570.76 : 136,073.06 = 57,729.20 : x
  2. Step 2: Convert to fraction form
    98,570.76/136,073.06 = 57,729.20/x
  3. Step 3: Cross multiply
    98,570.76x = 136,073.06 × 57,729.20
  4. Step 4: Simplify right side
    98,570.76x = 7,855,389,310.27
  5. Step 5: Solve for x
    x = 7,855,389,310.27/98,570.76
  6. Step 6: Final answer
    x = 79,692.90

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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.