Home / 99,472.32-137,228.64-57,021.12

Finding the Fourth Proportional to 99,472.32, 137,228.64 and 57,021.12

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Solution

The fourth proportional to 99,472.32, 137,228.64 and 57,021.12 is: 78,664.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,472.32 : 137,228.64 = 57,021.12 : x
  2. Step 2: Convert to fraction form
    99,472.32/137,228.64 = 57,021.12/x
  3. Step 3: Cross multiply
    99,472.32x = 137,228.64 × 57,021.12
  4. Step 4: Simplify right side
    99,472.32x = 7,824,930,748.88
  5. Step 5: Solve for x
    x = 7,824,930,748.88/99,472.32
  6. Step 6: Final answer
    x = 78,664.40

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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.