Home / 86,580,600.60-129,870,900.90-78,770,386.20

Finding the Fourth Proportional to 86,580,600.60, 129,870,900.90 and 78,770,386.20

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Solution

The fourth proportional to 86,580,600.60, 129,870,900.90 and 78,770,386.20 is: 118,155,579.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,580,600.60 : 129,870,900.90 = 78,770,386.20 : x
  2. Step 2: Convert to fraction form
    86,580,600.60/129,870,900.90 = 78,770,386.20/x
  3. Step 3: Cross multiply
    86,580,600.60x = 129,870,900.90 × 78,770,386.20
  4. Step 4: Simplify right side
    86,580,600.60x = 10,229,981,020,034,928
  5. Step 5: Solve for x
    x = 10,229,981,020,034,928/86,580,600.60
  6. Step 6: Final answer
    x = 118,155,579.30

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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.