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Finding the Fourth Proportional to 75,678.79, 103,680.41 and 72,841.16

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Solution

The fourth proportional to 75,678.79, 103,680.41 and 72,841.16 is: 99,792.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,678.79 : 103,680.41 = 72,841.16 : x
  2. Step 2: Convert to fraction form
    75,678.79/103,680.41 = 72,841.16/x
  3. Step 3: Cross multiply
    75,678.79x = 103,680.41 × 72,841.16
  4. Step 4: Simplify right side
    75,678.79x = 7,552,201,333.68
  5. Step 5: Solve for x
    x = 7,552,201,333.68/75,678.79
  6. Step 6: Final answer
    x = 99,792.84

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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.