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Finding the Fourth Proportional to 162,043.80, 243,284.40 and 128,801.40

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Solution

The fourth proportional to 162,043.80, 243,284.40 and 128,801.40 is: 193,375.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,043.80 : 243,284.40 = 128,801.40 : x
  2. Step 2: Convert to fraction form
    162,043.80/243,284.40 = 128,801.40/x
  3. Step 3: Cross multiply
    162,043.80x = 243,284.40 × 128,801.40
  4. Step 4: Simplify right side
    162,043.80x = 31,335,371,318.16
  5. Step 5: Solve for x
    x = 31,335,371,318.16/162,043.80
  6. Step 6: Final answer
    x = 193,375.93

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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.