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Finding the Fourth Proportional to 85,951.40, 118,882.50 and 76,015.40

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Solution

The fourth proportional to 85,951.40, 118,882.50 and 76,015.40 is: 105,139.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,951.40 : 118,882.50 = 76,015.40 : x
  2. Step 2: Convert to fraction form
    85,951.40/118,882.50 = 76,015.40/x
  3. Step 3: Cross multiply
    85,951.40x = 118,882.50 × 76,015.40
  4. Step 4: Simplify right side
    85,951.40x = 9,036,900,790.50
  5. Step 5: Solve for x
    x = 9,036,900,790.50/85,951.40
  6. Step 6: Final answer
    x = 105,139.66

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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.