Home / 76,731.39-115,022.70-39,309.12

Finding the Fourth Proportional to 76,731.39, 115,022.70 and 39,309.12

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Solution

The fourth proportional to 76,731.39, 115,022.70 and 39,309.12 is: 58,925.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,731.39 : 115,022.70 = 39,309.12 : x
  2. Step 2: Convert to fraction form
    76,731.39/115,022.70 = 39,309.12/x
  3. Step 3: Cross multiply
    76,731.39x = 115,022.70 × 39,309.12
  4. Step 4: Simplify right side
    76,731.39x = 4,521,441,117.02
  5. Step 5: Solve for x
    x = 4,521,441,117.02/76,731.39
  6. Step 6: Final answer
    x = 58,925.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.