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Finding the Fourth Proportional to 71,392.40, 107,088.60 and 68,670.80

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Solution

The fourth proportional to 71,392.40, 107,088.60 and 68,670.80 is: 103,006.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,392.40 : 107,088.60 = 68,670.80 : x
  2. Step 2: Convert to fraction form
    71,392.40/107,088.60 = 68,670.80/x
  3. Step 3: Cross multiply
    71,392.40x = 107,088.60 × 68,670.80
  4. Step 4: Simplify right side
    71,392.40x = 7,353,859,832.88
  5. Step 5: Solve for x
    x = 7,353,859,832.88/71,392.40
  6. Step 6: Final answer
    x = 103,006.20

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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.