Home / 105,064.96-145,043.04-81,137.92

Finding the Fourth Proportional to 105,064.96, 145,043.04 and 81,137.92

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Solution

The fourth proportional to 105,064.96, 145,043.04 and 81,137.92 is: 112,011.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,064.96 : 145,043.04 = 81,137.92 : x
  2. Step 2: Convert to fraction form
    105,064.96/145,043.04 = 81,137.92/x
  3. Step 3: Cross multiply
    105,064.96x = 145,043.04 × 81,137.92
  4. Step 4: Simplify right side
    105,064.96x = 11,768,490,576.08
  5. Step 5: Solve for x
    x = 11,768,490,576.08/105,064.96
  6. Step 6: Final answer
    x = 112,011.56

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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.