Home / 145,102.11-200,282.75-87,741.56

Finding the Fourth Proportional to 145,102.11, 200,282.75 and 87,741.56

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Solution

The fourth proportional to 145,102.11, 200,282.75 and 87,741.56 is: 121,108.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,102.11 : 200,282.75 = 87,741.56 : x
  2. Step 2: Convert to fraction form
    145,102.11/200,282.75 = 87,741.56/x
  3. Step 3: Cross multiply
    145,102.11x = 200,282.75 × 87,741.56
  4. Step 4: Simplify right side
    145,102.11x = 17,573,119,485.97
  5. Step 5: Solve for x
    x = 17,573,119,485.97/145,102.11
  6. Step 6: Final answer
    x = 121,108.64

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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.