Home / 81,721.96-112,756.48-47,711.07

Finding the Fourth Proportional to 81,721.96, 112,756.48 and 47,711.07

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Solution

The fourth proportional to 81,721.96, 112,756.48 and 47,711.07 is: 65,829.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,721.96 : 112,756.48 = 47,711.07 : x
  2. Step 2: Convert to fraction form
    81,721.96/112,756.48 = 47,711.07/x
  3. Step 3: Cross multiply
    81,721.96x = 112,756.48 × 47,711.07
  4. Step 4: Simplify right side
    81,721.96x = 5,379,732,190.96
  5. Step 5: Solve for x
    x = 5,379,732,190.96/81,721.96
  6. Step 6: Final answer
    x = 65,829.70

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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.