Home / 145,029.21-200,140.97-81,362.90

Finding the Fourth Proportional to 145,029.21, 200,140.97 and 81,362.90

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Solution

The fourth proportional to 145,029.21, 200,140.97 and 81,362.90 is: 112,281.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,029.21 : 200,140.97 = 81,362.90 : x
  2. Step 2: Convert to fraction form
    145,029.21/200,140.97 = 81,362.90/x
  3. Step 3: Cross multiply
    145,029.21x = 200,140.97 × 81,362.90
  4. Step 4: Simplify right side
    145,029.21x = 16,284,048,320.49
  5. Step 5: Solve for x
    x = 16,284,048,320.49/145,029.21
  6. Step 6: Final answer
    x = 112,281.16

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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.