Home / 145,125.40-200,247.78-81,465.88

Finding the Fourth Proportional to 145,125.40, 200,247.78 and 81,465.88

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Solution

The fourth proportional to 145,125.40, 200,247.78 and 81,465.88 is: 112,408.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,125.40 : 200,247.78 = 81,465.88 : x
  2. Step 2: Convert to fraction form
    145,125.40/200,247.78 = 81,465.88/x
  3. Step 3: Cross multiply
    145,125.40x = 200,247.78 × 81,465.88
  4. Step 4: Simplify right side
    145,125.40x = 16,313,361,615.75
  5. Step 5: Solve for x
    x = 16,313,361,615.75/145,125.40
  6. Step 6: Final answer
    x = 112,408.73

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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.