Home / 145,721.96-201,090.88-81,189.68

Finding the Fourth Proportional to 145,721.96, 201,090.88 and 81,189.68

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Solution

The fourth proportional to 145,721.96, 201,090.88 and 81,189.68 is: 112,038.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,721.96 : 201,090.88 = 81,189.68 : x
  2. Step 2: Convert to fraction form
    145,721.96/201,090.88 = 81,189.68/x
  3. Step 3: Cross multiply
    145,721.96x = 201,090.88 × 81,189.68
  4. Step 4: Simplify right side
    145,721.96x = 16,326,504,198.12
  5. Step 5: Solve for x
    x = 16,326,504,198.12/145,721.96
  6. Step 6: Final answer
    x = 112,038.74

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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.