Home / 80,985.28-111,759.80-47,000.40

Finding the Fourth Proportional to 80,985.28, 111,759.80 and 47,000.40

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Solution

The fourth proportional to 80,985.28, 111,759.80 and 47,000.40 is: 64,860.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,985.28 : 111,759.80 = 47,000.40 : x
  2. Step 2: Convert to fraction form
    80,985.28/111,759.80 = 47,000.40/x
  3. Step 3: Cross multiply
    80,985.28x = 111,759.80 × 47,000.40
  4. Step 4: Simplify right side
    80,985.28x = 5,252,755,303.92
  5. Step 5: Solve for x
    x = 5,252,755,303.92/80,985.28
  6. Step 6: Final answer
    x = 64,860.62

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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.