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Finding the Fourth Proportional to 113,280.80, 169,921.20 and 102,005.60

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Solution

The fourth proportional to 113,280.80, 169,921.20 and 102,005.60 is: 153,008.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,280.80 : 169,921.20 = 102,005.60 : x
  2. Step 2: Convert to fraction form
    113,280.80/169,921.20 = 102,005.60/x
  3. Step 3: Cross multiply
    113,280.80x = 169,921.20 × 102,005.60
  4. Step 4: Simplify right side
    113,280.80x = 17,332,913,958.72
  5. Step 5: Solve for x
    x = 17,332,913,958.72/113,280.80
  6. Step 6: Final answer
    x = 153,008.40

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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.