Home / 81,720.24-112,785.30-45,913.02

Finding the Fourth Proportional to 81,720.24, 112,785.30 and 45,913.02

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Solution

The fourth proportional to 81,720.24, 112,785.30 and 45,913.02 is: 63,366.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,720.24 : 112,785.30 = 45,913.02 : x
  2. Step 2: Convert to fraction form
    81,720.24/112,785.30 = 45,913.02/x
  3. Step 3: Cross multiply
    81,720.24x = 112,785.30 × 45,913.02
  4. Step 4: Simplify right side
    81,720.24x = 5,178,313,734.61
  5. Step 5: Solve for x
    x = 5,178,313,734.61/81,720.24
  6. Step 6: Final answer
    x = 63,366.35

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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.