Home / 99,311.36-136,889.76-81,374.72

Finding the Fourth Proportional to 99,311.36, 136,889.76 and 81,374.72

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Solution

The fourth proportional to 99,311.36, 136,889.76 and 81,374.72 is: 112,166.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,311.36 : 136,889.76 = 81,374.72 : x
  2. Step 2: Convert to fraction form
    99,311.36/136,889.76 = 81,374.72/x
  3. Step 3: Cross multiply
    99,311.36x = 136,889.76 × 81,374.72
  4. Step 4: Simplify right side
    99,311.36x = 11,139,365,890.87
  5. Step 5: Solve for x
    x = 11,139,365,890.87/99,311.36
  6. Step 6: Final answer
    x = 112,166.08

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1.5x scale

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.