Home / 145,085.92-200,218.32-81,429.60

Finding the Fourth Proportional to 145,085.92, 200,218.32 and 81,429.60

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Solution

The fourth proportional to 145,085.92, 200,218.32 and 81,429.60 is: 112,372.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,085.92 : 200,218.32 = 81,429.60 : x
  2. Step 2: Convert to fraction form
    145,085.92/200,218.32 = 81,429.60/x
  3. Step 3: Cross multiply
    145,085.92x = 200,218.32 × 81,429.60
  4. Step 4: Simplify right side
    145,085.92x = 16,303,697,710.27
  5. Step 5: Solve for x
    x = 16,303,697,710.27/145,085.92
  6. Step 6: Final answer
    x = 112,372.71

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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.