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Finding the Fourth Proportional to 112,231.40, 168,039.90 and 87,655.40

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Solution

The fourth proportional to 112,231.40, 168,039.90 and 87,655.40 is: 131,243.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,231.40 : 168,039.90 = 87,655.40 : x
  2. Step 2: Convert to fraction form
    112,231.40/168,039.90 = 87,655.40/x
  3. Step 3: Cross multiply
    112,231.40x = 168,039.90 × 87,655.40
  4. Step 4: Simplify right side
    112,231.40x = 14,729,604,650.46
  5. Step 5: Solve for x
    x = 14,729,604,650.46/112,231.40
  6. Step 6: Final answer
    x = 131,243.17

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1.5x scale

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.