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Finding the Fourth Proportional to 75,685.44, 103,689.60 and 72,847.80

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Solution

The fourth proportional to 75,685.44, 103,689.60 and 72,847.80 is: 99,802.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,685.44 : 103,689.60 = 72,847.80 : x
  2. Step 2: Convert to fraction form
    75,685.44/103,689.60 = 72,847.80/x
  3. Step 3: Cross multiply
    75,685.44x = 103,689.60 × 72,847.80
  4. Step 4: Simplify right side
    75,685.44x = 7,553,559,242.88
  5. Step 5: Solve for x
    x = 7,553,559,242.88/75,685.44
  6. Step 6: Final answer
    x = 99,802.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.