Home / 156,777.78-216,270.40-99,315.72

Finding the Fourth Proportional to 156,777.78, 216,270.40 and 99,315.72

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Solution

The fourth proportional to 156,777.78, 216,270.40 and 99,315.72 is: 137,003.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,777.78 : 216,270.40 = 99,315.72 : x
  2. Step 2: Convert to fraction form
    156,777.78/216,270.40 = 99,315.72/x
  3. Step 3: Cross multiply
    156,777.78x = 216,270.40 × 99,315.72
  4. Step 4: Simplify right side
    156,777.78x = 21,479,050,490.69
  5. Step 5: Solve for x
    x = 21,479,050,490.69/156,777.78
  6. Step 6: Final answer
    x = 137,003.15

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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.