Home / 138,387.69-190,942.11-77,946.30

Finding the Fourth Proportional to 138,387.69, 190,942.11 and 77,946.30

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Solution

The fourth proportional to 138,387.69, 190,942.11 and 77,946.30 is: 107,547.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,387.69 : 190,942.11 = 77,946.30 : x
  2. Step 2: Convert to fraction form
    138,387.69/190,942.11 = 77,946.30/x
  3. Step 3: Cross multiply
    138,387.69x = 190,942.11 × 77,946.30
  4. Step 4: Simplify right side
    138,387.69x = 14,883,230,988.69
  5. Step 5: Solve for x
    x = 14,883,230,988.69/138,387.69
  6. Step 6: Final answer
    x = 107,547.36

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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.