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Finding the Fourth Proportional to 231,720.80, 347,710.80 and 98,578.40

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Solution

The fourth proportional to 231,720.80, 347,710.80 and 98,578.40 is: 147,922.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,720.80 : 347,710.80 = 98,578.40 : x
  2. Step 2: Convert to fraction form
    231,720.80/347,710.80 = 98,578.40/x
  3. Step 3: Cross multiply
    231,720.80x = 347,710.80 × 98,578.40
  4. Step 4: Simplify right side
    231,720.80x = 34,276,774,326.72
  5. Step 5: Solve for x
    x = 34,276,774,326.72/231,720.80
  6. Step 6: Final answer
    x = 147,922.73

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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.