Home / 100,621,927.20-138,857,424.56-56,569,122.40

Finding the Fourth Proportional to 100,621,927.20, 138,857,424.56 and 56,569,122.40

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Solution

The fourth proportional to 100,621,927.20, 138,857,424.56 and 56,569,122.40 is: 78,064,919.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,621,927.20 : 138,857,424.56 = 56,569,122.40 : x
  2. Step 2: Convert to fraction form
    100,621,927.20/138,857,424.56 = 56,569,122.40/x
  3. Step 3: Cross multiply
    100,621,927.20x = 138,857,424.56 × 56,569,122.40
  4. Step 4: Simplify right side
    100,621,927.20x = 7,855,042,646,083,406
  5. Step 5: Solve for x
    x = 7,855,042,646,083,406/100,621,927.20
  6. Step 6: Final answer
    x = 78,064,919.49

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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.