Home / 76,715.34-105,812.64-51,208.85

Finding the Fourth Proportional to 76,715.34, 105,812.64 and 51,208.85

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Solution

The fourth proportional to 76,715.34, 105,812.64 and 51,208.85 is: 70,631.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,715.34 : 105,812.64 = 51,208.85 : x
  2. Step 2: Convert to fraction form
    76,715.34/105,812.64 = 51,208.85/x
  3. Step 3: Cross multiply
    76,715.34x = 105,812.64 × 51,208.85
  4. Step 4: Simplify right side
    76,715.34x = 5,418,543,080.80
  5. Step 5: Solve for x
    x = 5,418,543,080.80/76,715.34
  6. Step 6: Final answer
    x = 70,631.81

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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.