Home / 99,987.60-149,738.40-53,137.20

Finding the Fourth Proportional to 99,987.60, 149,738.40 and 53,137.20

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Solution

The fourth proportional to 99,987.60, 149,738.40 and 53,137.20 is: 79,576.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,987.60 : 149,738.40 = 53,137.20 : x
  2. Step 2: Convert to fraction form
    99,987.60/149,738.40 = 53,137.20/x
  3. Step 3: Cross multiply
    99,987.60x = 149,738.40 × 53,137.20
  4. Step 4: Simplify right side
    99,987.60x = 7,956,679,308.48
  5. Step 5: Solve for x
    x = 7,956,679,308.48/99,987.60
  6. Step 6: Final answer
    x = 79,576.66

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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.