Home / 155,830,830.94-215,052,876.75-86,215,078

Finding the Fourth Proportional to 155,830,830.94, 215,052,876.75 and 86,215,078

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Solution

The fourth proportional to 155,830,830.94, 215,052,876.75 and 86,215,078 is: 118,980,309.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,830,830.94 : 215,052,876.75 = 86,215,078 : x
  2. Step 2: Convert to fraction form
    155,830,830.94/215,052,876.75 = 86,215,078/x
  3. Step 3: Cross multiply
    155,830,830.94x = 215,052,876.75 × 86,215,078
  4. Step 4: Simplify right side
    155,830,830.94x = 18,540,800,543,125,636
  5. Step 5: Solve for x
    x = 18,540,800,543,125,636/155,830,830.94
  6. Step 6: Final answer
    x = 118,980,309.81

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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.