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Finding the Fourth Proportional to 245,612.80, 368,419.20 and 87,846.40

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Solution

The fourth proportional to 245,612.80, 368,419.20 and 87,846.40 is: 131,769.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,612.80 : 368,419.20 = 87,846.40 : x
  2. Step 2: Convert to fraction form
    245,612.80/368,419.20 = 87,846.40/x
  3. Step 3: Cross multiply
    245,612.80x = 368,419.20 × 87,846.40
  4. Step 4: Simplify right side
    245,612.80x = 32,364,300,410.88
  5. Step 5: Solve for x
    x = 32,364,300,410.88/245,612.80
  6. Step 6: Final answer
    x = 131,769.60

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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.