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Finding the Fourth Proportional to 245,381.60, 368,072.40 and 87,615.20

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Solution

The fourth proportional to 245,381.60, 368,072.40 and 87,615.20 is: 131,422.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,381.60 : 368,072.40 = 87,615.20 : x
  2. Step 2: Convert to fraction form
    245,381.60/368,072.40 = 87,615.20/x
  3. Step 3: Cross multiply
    245,381.60x = 368,072.40 × 87,615.20
  4. Step 4: Simplify right side
    245,381.60x = 32,248,736,940.48
  5. Step 5: Solve for x
    x = 32,248,736,940.48/245,381.60
  6. Step 6: Final answer
    x = 131,422.80

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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.