Home / 105,679.28-145,834.02-57,931.61

Finding the Fourth Proportional to 105,679.28, 145,834.02 and 57,931.61

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Solution

The fourth proportional to 105,679.28, 145,834.02 and 57,931.61 is: 79,943.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,679.28 : 145,834.02 = 57,931.61 : x
  2. Step 2: Convert to fraction form
    105,679.28/145,834.02 = 57,931.61/x
  3. Step 3: Cross multiply
    105,679.28x = 145,834.02 × 57,931.61
  4. Step 4: Simplify right side
    105,679.28x = 8,448,398,842.20
  5. Step 5: Solve for x
    x = 8,448,398,842.20/105,679.28
  6. Step 6: Final answer
    x = 79,943.76

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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.