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Finding the Fourth Proportional to 105,679.76, 145,838.20 and 57,934.84

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Solution

The fourth proportional to 105,679.76, 145,838.20 and 57,934.84 is: 79,950.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,679.76 : 145,838.20 = 57,934.84 : x
  2. Step 2: Convert to fraction form
    105,679.76/145,838.20 = 57,934.84/x
  3. Step 3: Cross multiply
    105,679.76x = 145,838.20 × 57,934.84
  4. Step 4: Simplify right side
    105,679.76x = 8,449,112,782.89
  5. Step 5: Solve for x
    x = 8,449,112,782.89/105,679.76
  6. Step 6: Final answer
    x = 79,950.15

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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.