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Finding the Fourth Proportional to 127,986.86, 176,607.86 and 90,195.50

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Solution

The fourth proportional to 127,986.86, 176,607.86 and 90,195.50 is: 124,459.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,986.86 : 176,607.86 = 90,195.50 : x
  2. Step 2: Convert to fraction form
    127,986.86/176,607.86 = 90,195.50/x
  3. Step 3: Cross multiply
    127,986.86x = 176,607.86 × 90,195.50
  4. Step 4: Simplify right side
    127,986.86x = 15,929,234,236.63
  5. Step 5: Solve for x
    x = 15,929,234,236.63/127,986.86
  6. Step 6: Final answer
    x = 124,459.92

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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.