Home / 91,451.10-137,176.65-81,536.70

Finding the Fourth Proportional to 91,451.10, 137,176.65 and 81,536.70

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Solution

The fourth proportional to 91,451.10, 137,176.65 and 81,536.70 is: 122,305.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,451.10 : 137,176.65 = 81,536.70 : x
  2. Step 2: Convert to fraction form
    91,451.10/137,176.65 = 81,536.70/x
  3. Step 3: Cross multiply
    91,451.10x = 137,176.65 × 81,536.70
  4. Step 4: Simplify right side
    91,451.10x = 11,184,931,358.06
  5. Step 5: Solve for x
    x = 11,184,931,358.06/91,451.10
  6. Step 6: Final answer
    x = 122,305.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.