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Finding the Fourth Proportional to 231,978.30, 347,967.45 and 113,880.30

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Solution

The fourth proportional to 231,978.30, 347,967.45 and 113,880.30 is: 170,820.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,978.30 : 347,967.45 = 113,880.30 : x
  2. Step 2: Convert to fraction form
    231,978.30/347,967.45 = 113,880.30/x
  3. Step 3: Cross multiply
    231,978.30x = 347,967.45 × 113,880.30
  4. Step 4: Simplify right side
    231,978.30x = 39,626,637,596.24
  5. Step 5: Solve for x
    x = 39,626,637,596.24/231,978.30
  6. Step 6: Final answer
    x = 170,820.45

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1.5x scale

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.