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Finding the Fourth Proportional to 162,009.40, 243,014.10 and 128,548.30

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Solution

The fourth proportional to 162,009.40, 243,014.10 and 128,548.30 is: 192,822.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,009.40 : 243,014.10 = 128,548.30 : x
  2. Step 2: Convert to fraction form
    162,009.40/243,014.10 = 128,548.30/x
  3. Step 3: Cross multiply
    162,009.40x = 243,014.10 × 128,548.30
  4. Step 4: Simplify right side
    162,009.40x = 31,239,049,431.03
  5. Step 5: Solve for x
    x = 31,239,049,431.03/162,009.40
  6. Step 6: Final answer
    x = 192,822.45

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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.