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Finding the Fourth Proportional to 159,615.40, 239,423.10 and 128,511.40

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Solution

The fourth proportional to 159,615.40, 239,423.10 and 128,511.40 is: 192,767.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,615.40 : 239,423.10 = 128,511.40 : x
  2. Step 2: Convert to fraction form
    159,615.40/239,423.10 = 128,511.40/x
  3. Step 3: Cross multiply
    159,615.40x = 239,423.10 × 128,511.40
  4. Step 4: Simplify right side
    159,615.40x = 30,768,597,773.34
  5. Step 5: Solve for x
    x = 30,768,597,773.34/159,615.40
  6. Step 6: Final answer
    x = 192,767.10

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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.