Home / 113,121.63-156,098.75-65,378.07

Finding the Fourth Proportional to 113,121.63, 156,098.75 and 65,378.07

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Solution

The fourth proportional to 113,121.63, 156,098.75 and 65,378.07 is: 90,216.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,121.63 : 156,098.75 = 65,378.07 : x
  2. Step 2: Convert to fraction form
    113,121.63/156,098.75 = 65,378.07/x
  3. Step 3: Cross multiply
    113,121.63x = 156,098.75 × 65,378.07
  4. Step 4: Simplify right side
    113,121.63x = 10,205,434,677.52
  5. Step 5: Solve for x
    x = 10,205,434,677.52/113,121.63
  6. Step 6: Final answer
    x = 90,216.47

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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.