Home / 76,716.07-105,868.21-42,731.08

Finding the Fourth Proportional to 76,716.07, 105,868.21 and 42,731.08

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Solution

The fourth proportional to 76,716.07, 105,868.21 and 42,731.08 is: 58,968.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,716.07 : 105,868.21 = 42,731.08 : x
  2. Step 2: Convert to fraction form
    76,716.07/105,868.21 = 42,731.08/x
  3. Step 3: Cross multiply
    76,716.07x = 105,868.21 × 42,731.08
  4. Step 4: Simplify right side
    76,716.07x = 4,523,862,579.47
  5. Step 5: Solve for x
    x = 4,523,862,579.47/76,716.07
  6. Step 6: Final answer
    x = 58,968.91

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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.