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Finding the Fourth Proportional to 98,378.55, 147,345.80 and 68,927.85

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Solution

The fourth proportional to 98,378.55, 147,345.80 and 68,927.85 is: 103,236.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,378.55 : 147,345.80 = 68,927.85 : x
  2. Step 2: Convert to fraction form
    98,378.55/147,345.80 = 68,927.85/x
  3. Step 3: Cross multiply
    98,378.55x = 147,345.80 × 68,927.85
  4. Step 4: Simplify right side
    98,378.55x = 10,156,228,855.89
  5. Step 5: Solve for x
    x = 10,156,228,855.89/98,378.55
  6. Step 6: Final answer
    x = 103,236.21

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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.