Home / 138,392.81-190,981.22-77,982.92

Finding the Fourth Proportional to 138,392.81, 190,981.22 and 77,982.92

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Solution

The fourth proportional to 138,392.81, 190,981.22 and 77,982.92 is: 107,615.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,392.81 : 190,981.22 = 77,982.92 : x
  2. Step 2: Convert to fraction form
    138,392.81/190,981.22 = 77,982.92/x
  3. Step 3: Cross multiply
    138,392.81x = 190,981.22 × 77,982.92
  4. Step 4: Simplify right side
    138,392.81x = 14,893,271,855.94
  5. Step 5: Solve for x
    x = 14,893,271,855.94/138,392.81
  6. Step 6: Final answer
    x = 107,615.94

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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.