Home / 81,213.18-112,065.03-45,402

Finding the Fourth Proportional to 81,213.18, 112,065.03 and 45,402

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Solution

The fourth proportional to 81,213.18, 112,065.03 and 45,402 is: 62,649.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,213.18 : 112,065.03 = 45,402 : x
  2. Step 2: Convert to fraction form
    81,213.18/112,065.03 = 45,402/x
  3. Step 3: Cross multiply
    81,213.18x = 112,065.03 × 45,402
  4. Step 4: Simplify right side
    81,213.18x = 5,087,976,492.06
  5. Step 5: Solve for x
    x = 5,087,976,492.06/81,213.18
  6. Step 6: Final answer
    x = 62,649.64

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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.