Home / 81,576.63-112,689.36-77,320.35

Finding the Fourth Proportional to 81,576.63, 112,689.36 and 77,320.35

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Solution

The fourth proportional to 81,576.63, 112,689.36 and 77,320.35 is: 106,809.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,576.63 : 112,689.36 = 77,320.35 : x
  2. Step 2: Convert to fraction form
    81,576.63/112,689.36 = 77,320.35/x
  3. Step 3: Cross multiply
    81,576.63x = 112,689.36 × 77,320.35
  4. Step 4: Simplify right side
    81,576.63x = 8,713,180,756.48
  5. Step 5: Solve for x
    x = 8,713,180,756.48/81,576.63
  6. Step 6: Final answer
    x = 106,809.77

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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.