Home / 105,189.12-145,154.61-57,432.78

Finding the Fourth Proportional to 105,189.12, 145,154.61 and 57,432.78

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Solution

The fourth proportional to 105,189.12, 145,154.61 and 57,432.78 is: 79,253.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,189.12 : 145,154.61 = 57,432.78 : x
  2. Step 2: Convert to fraction form
    105,189.12/145,154.61 = 57,432.78/x
  3. Step 3: Cross multiply
    105,189.12x = 145,154.61 × 57,432.78
  4. Step 4: Simplify right side
    105,189.12x = 8,336,632,782.12
  5. Step 5: Solve for x
    x = 8,336,632,782.12/105,189.12
  6. Step 6: Final answer
    x = 79,253.76

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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.