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Finding the Fourth Proportional to 86,913.20, 130,369.80 and 34,295.60

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Solution

The fourth proportional to 86,913.20, 130,369.80 and 34,295.60 is: 51,443.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,913.20 : 130,369.80 = 34,295.60 : x
  2. Step 2: Convert to fraction form
    86,913.20/130,369.80 = 34,295.60/x
  3. Step 3: Cross multiply
    86,913.20x = 130,369.80 × 34,295.60
  4. Step 4: Simplify right side
    86,913.20x = 4,471,110,512.88
  5. Step 5: Solve for x
    x = 4,471,110,512.88/86,913.20
  6. Step 6: Final answer
    x = 51,443.40

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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.