Home / 138,740.78-207,986.28-49,931.84

Finding the Fourth Proportional to 138,740.78, 207,986.28 and 49,931.84

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Solution

The fourth proportional to 138,740.78, 207,986.28 and 49,931.84 is: 74,852.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,740.78 : 207,986.28 = 49,931.84 : x
  2. Step 2: Convert to fraction form
    138,740.78/207,986.28 = 49,931.84/x
  3. Step 3: Cross multiply
    138,740.78x = 207,986.28 × 49,931.84
  4. Step 4: Simplify right side
    138,740.78x = 10,385,137,655.16
  5. Step 5: Solve for x
    x = 10,385,137,655.16/138,740.78
  6. Step 6: Final answer
    x = 74,852.81

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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.