Home / 156,783.40-216,278.16-99,321.36

Finding the Fourth Proportional to 156,783.40, 216,278.16 and 99,321.36

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Solution

The fourth proportional to 156,783.40, 216,278.16 and 99,321.36 is: 137,010.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,783.40 : 216,278.16 = 99,321.36 : x
  2. Step 2: Convert to fraction form
    156,783.40/216,278.16 = 99,321.36/x
  3. Step 3: Cross multiply
    156,783.40x = 216,278.16 × 99,321.36
  4. Step 4: Simplify right side
    156,783.40x = 21,481,040,989.50
  5. Step 5: Solve for x
    x = 21,481,040,989.50/156,783.40
  6. Step 6: Final answer
    x = 137,010.94

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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.