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Finding the Fourth Proportional to 169,609.60, 254,443.20 and 90,702.40

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Solution

The fourth proportional to 169,609.60, 254,443.20 and 90,702.40 is: 136,069.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,609.60 : 254,443.20 = 90,702.40 : x
  2. Step 2: Convert to fraction form
    169,609.60/254,443.20 = 90,702.40/x
  3. Step 3: Cross multiply
    169,609.60x = 254,443.20 × 90,702.40
  4. Step 4: Simplify right side
    169,609.60x = 23,078,608,903.68
  5. Step 5: Solve for x
    x = 23,078,608,903.68/169,609.60
  6. Step 6: Final answer
    x = 136,069.00

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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.