Home / 145,043.79-200,163.88-81,386.30

Finding the Fourth Proportional to 145,043.79, 200,163.88 and 81,386.30

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Solution

The fourth proportional to 145,043.79, 200,163.88 and 81,386.30 is: 112,315.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,043.79 : 200,163.88 = 81,386.30 : x
  2. Step 2: Convert to fraction form
    145,043.79/200,163.88 = 81,386.30/x
  3. Step 3: Cross multiply
    145,043.79x = 200,163.88 × 81,386.30
  4. Step 4: Simplify right side
    145,043.79x = 16,290,597,586.84
  5. Step 5: Solve for x
    x = 16,290,597,586.84/145,043.79
  6. Step 6: Final answer
    x = 112,315.03

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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.