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Finding the Fourth Proportional to 138,666.60, 191,359.67 and 75,004.65

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Solution

The fourth proportional to 138,666.60, 191,359.67 and 75,004.65 is: 103,506.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,666.60 : 191,359.67 = 75,004.65 : x
  2. Step 2: Convert to fraction form
    138,666.60/191,359.67 = 75,004.65/x
  3. Step 3: Cross multiply
    138,666.60x = 191,359.67 × 75,004.65
  4. Step 4: Simplify right side
    138,666.60x = 14,352,864,697.44
  5. Step 5: Solve for x
    x = 14,352,864,697.44/138,666.60
  6. Step 6: Final answer
    x = 103,506.29

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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.