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Finding the Fourth Proportional to 236,674.32, 354,934.80 and 78,860.40

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Solution

The fourth proportional to 236,674.32, 354,934.80 and 78,860.40 is: 118,265.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,674.32 : 354,934.80 = 78,860.40 : x
  2. Step 2: Convert to fraction form
    236,674.32/354,934.80 = 78,860.40/x
  3. Step 3: Cross multiply
    236,674.32x = 354,934.80 × 78,860.40
  4. Step 4: Simplify right side
    236,674.32x = 27,990,300,301.92
  5. Step 5: Solve for x
    x = 27,990,300,301.92/236,674.32
  6. Step 6: Final answer
    x = 118,265.05

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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.