Home / 86,289,270.80-129,433,906.20-72,684,381.20

Finding the Fourth Proportional to 86,289,270.80, 129,433,906.20 and 72,684,381.20

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Solution

The fourth proportional to 86,289,270.80, 129,433,906.20 and 72,684,381.20 is: 109,026,571.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,289,270.80 : 129,433,906.20 = 72,684,381.20 : x
  2. Step 2: Convert to fraction form
    86,289,270.80/129,433,906.20 = 72,684,381.20/x
  3. Step 3: Cross multiply
    86,289,270.80x = 129,433,906.20 × 72,684,381.20
  4. Step 4: Simplify right side
    86,289,270.80x = 9,407,823,378,445,844
  5. Step 5: Solve for x
    x = 9,407,823,378,445,844/86,289,270.80
  6. Step 6: Final answer
    x = 109,026,571.80

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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.