Home / 81,238.10-112,107.81-45,427.70

Finding the Fourth Proportional to 81,238.10, 112,107.81 and 45,427.70

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Solution

The fourth proportional to 81,238.10, 112,107.81 and 45,427.70 is: 62,689.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,238.10 : 112,107.81 = 45,427.70 : x
  2. Step 2: Convert to fraction form
    81,238.10/112,107.81 = 45,427.70/x
  3. Step 3: Cross multiply
    81,238.10x = 112,107.81 × 45,427.70
  4. Step 4: Simplify right side
    81,238.10x = 5,092,799,960.34
  5. Step 5: Solve for x
    x = 5,092,799,960.34/81,238.10
  6. Step 6: Final answer
    x = 62,689.80

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1.5x scale

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.