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Finding the Fourth Proportional to 162,015.40, 243,023.10 and 128,554.30

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Solution

The fourth proportional to 162,015.40, 243,023.10 and 128,554.30 is: 192,831.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,015.40 : 243,023.10 = 128,554.30 : x
  2. Step 2: Convert to fraction form
    162,015.40/243,023.10 = 128,554.30/x
  3. Step 3: Cross multiply
    162,015.40x = 243,023.10 × 128,554.30
  4. Step 4: Simplify right side
    162,015.40x = 31,241,664,504.33
  5. Step 5: Solve for x
    x = 31,241,664,504.33/162,015.40
  6. Step 6: Final answer
    x = 192,831.45

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1.5x scale

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.