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Finding the Fourth Proportional to 138,516.65, 207,744.79 and 37,312.21

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Solution

The fourth proportional to 138,516.65, 207,744.79 and 37,312.21 is: 55,960.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,516.65 : 207,744.79 = 37,312.21 : x
  2. Step 2: Convert to fraction form
    138,516.65/207,744.79 = 37,312.21/x
  3. Step 3: Cross multiply
    138,516.65x = 207,744.79 × 37,312.21
  4. Step 4: Simplify right side
    138,516.65x = 7,751,417,230.89
  5. Step 5: Solve for x
    x = 7,751,417,230.89/138,516.65
  6. Step 6: Final answer
    x = 55,960.18

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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.