Home / 120,031.42-165,502.86-81,813.60

Finding the Fourth Proportional to 120,031.42, 165,502.86 and 81,813.60

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Solution

The fourth proportional to 120,031.42, 165,502.86 and 81,813.60 is: 112,807.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,031.42 : 165,502.86 = 81,813.60 : x
  2. Step 2: Convert to fraction form
    120,031.42/165,502.86 = 81,813.60/x
  3. Step 3: Cross multiply
    120,031.42x = 165,502.86 × 81,813.60
  4. Step 4: Simplify right side
    120,031.42x = 13,540,384,786.90
  5. Step 5: Solve for x
    x = 13,540,384,786.90/120,031.42
  6. Step 6: Final answer
    x = 112,807.00

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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.