Home / 81,867.98-112,991.62-47,407.70

Finding the Fourth Proportional to 81,867.98, 112,991.62 and 47,407.70

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Solution

The fourth proportional to 81,867.98, 112,991.62 and 47,407.70 is: 65,430.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,867.98 : 112,991.62 = 47,407.70 : x
  2. Step 2: Convert to fraction form
    81,867.98/112,991.62 = 47,407.70/x
  3. Step 3: Cross multiply
    81,867.98x = 112,991.62 × 47,407.70
  4. Step 4: Simplify right side
    81,867.98x = 5,356,672,823.47
  5. Step 5: Solve for x
    x = 5,356,672,823.47/81,867.98
  6. Step 6: Final answer
    x = 65,430.62

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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.