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Finding the Fourth Proportional to 73,989,028.80, 110,983,543.20 and 71,012,959.20

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Solution

The fourth proportional to 73,989,028.80, 110,983,543.20 and 71,012,959.20 is: 106,519,438.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,989,028.80 : 110,983,543.20 = 71,012,959.20 : x
  2. Step 2: Convert to fraction form
    73,989,028.80/110,983,543.20 = 71,012,959.20/x
  3. Step 3: Cross multiply
    73,989,028.80x = 110,983,543.20 × 71,012,959.20
  4. Step 4: Simplify right side
    73,989,028.80x = 7,881,269,825,133,038
  5. Step 5: Solve for x
    x = 7,881,269,825,133,038/73,989,028.80
  6. Step 6: Final answer
    x = 106,519,438.80

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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.