Home / 138,338.03-190,911.60-77,089.74

Finding the Fourth Proportional to 138,338.03, 190,911.60 and 77,089.74

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Solution

The fourth proportional to 138,338.03, 190,911.60 and 77,089.74 is: 106,386.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,338.03 : 190,911.60 = 77,089.74 : x
  2. Step 2: Convert to fraction form
    138,338.03/190,911.60 = 77,089.74/x
  3. Step 3: Cross multiply
    138,338.03x = 190,911.60 × 77,089.74
  4. Step 4: Simplify right side
    138,338.03x = 14,717,325,606.98
  5. Step 5: Solve for x
    x = 14,717,325,606.98/138,338.03
  6. Step 6: Final answer
    x = 106,386.69

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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.