Home / 112,188.24-154,829.88-78,246

Finding the Fourth Proportional to 112,188.24, 154,829.88 and 78,246

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Solution

The fourth proportional to 112,188.24, 154,829.88 and 78,246 is: 107,986.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,188.24 : 154,829.88 = 78,246 : x
  2. Step 2: Convert to fraction form
    112,188.24/154,829.88 = 78,246/x
  3. Step 3: Cross multiply
    112,188.24x = 154,829.88 × 78,246
  4. Step 4: Simplify right side
    112,188.24x = 12,114,818,790.48
  5. Step 5: Solve for x
    x = 12,114,818,790.48/112,188.24
  6. Step 6: Final answer
    x = 107,986.53

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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.