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Finding the Fourth Proportional to 191,420.56, 264,162.90 and 105,389.56

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Solution

The fourth proportional to 191,420.56, 264,162.90 and 105,389.56 is: 145,438.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,420.56 : 264,162.90 = 105,389.56 : x
  2. Step 2: Convert to fraction form
    191,420.56/264,162.90 = 105,389.56/x
  3. Step 3: Cross multiply
    191,420.56x = 264,162.90 × 105,389.56
  4. Step 4: Simplify right side
    191,420.56x = 27,840,011,799.32
  5. Step 5: Solve for x
    x = 27,840,011,799.32/191,420.56
  6. Step 6: Final answer
    x = 145,438.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.