Home / 86,019,871.20-129,029,806.80-77,260,984.80

Finding the Fourth Proportional to 86,019,871.20, 129,029,806.80 and 77,260,984.80

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Solution

The fourth proportional to 86,019,871.20, 129,029,806.80 and 77,260,984.80 is: 115,891,477.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,019,871.20 : 129,029,806.80 = 77,260,984.80 : x
  2. Step 2: Convert to fraction form
    86,019,871.20/129,029,806.80 = 77,260,984.80/x
  3. Step 3: Cross multiply
    86,019,871.20x = 129,029,806.80 × 77,260,984.80
  4. Step 4: Simplify right side
    86,019,871.20x = 9,968,969,941,921,736
  5. Step 5: Solve for x
    x = 9,968,969,941,921,736/86,019,871.20
  6. Step 6: Final answer
    x = 115,891,477.20

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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.