Home / 77,068.46-115,610.38-20,909.49

Finding the Fourth Proportional to 77,068.46, 115,610.38 and 20,909.49

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Solution

The fourth proportional to 77,068.46, 115,610.38 and 20,909.49 is: 31,366.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,068.46 : 115,610.38 = 20,909.49 : x
  2. Step 2: Convert to fraction form
    77,068.46/115,610.38 = 20,909.49/x
  3. Step 3: Cross multiply
    77,068.46x = 115,610.38 × 20,909.49
  4. Step 4: Simplify right side
    77,068.46x = 2,417,354,084.51
  5. Step 5: Solve for x
    x = 2,417,354,084.51/77,068.46
  6. Step 6: Final answer
    x = 31,366.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.