Home / 101,987,319.20-152,980,978.80-81,831,927.20

Finding the Fourth Proportional to 101,987,319.20, 152,980,978.80 and 81,831,927.20

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Solution

The fourth proportional to 101,987,319.20, 152,980,978.80 and 81,831,927.20 is: 122,747,890.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,987,319.20 : 152,980,978.80 = 81,831,927.20 : x
  2. Step 2: Convert to fraction form
    101,987,319.20/152,980,978.80 = 81,831,927.20/x
  3. Step 3: Cross multiply
    101,987,319.20x = 152,980,978.80 × 81,831,927.20
  4. Step 4: Simplify right side
    101,987,319.20x = 12,518,728,320,146,344
  5. Step 5: Solve for x
    x = 12,518,728,320,146,344/101,987,319.20
  6. Step 6: Final answer
    x = 122,747,890.80

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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.