Home / 135,507.13-187,004.63-81,781.65

Finding the Fourth Proportional to 135,507.13, 187,004.63 and 81,781.65

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Solution

The fourth proportional to 135,507.13, 187,004.63 and 81,781.65 is: 112,861.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,507.13 : 187,004.63 = 81,781.65 : x
  2. Step 2: Convert to fraction form
    135,507.13/187,004.63 = 81,781.65/x
  3. Step 3: Cross multiply
    135,507.13x = 187,004.63 × 81,781.65
  4. Step 4: Simplify right side
    135,507.13x = 15,293,547,403.49
  5. Step 5: Solve for x
    x = 15,293,547,403.49/135,507.13
  6. Step 6: Final answer
    x = 112,861.57

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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.