Home / 117,288.81-161,856.79-66,299.74

Finding the Fourth Proportional to 117,288.81, 161,856.79 and 66,299.74

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Solution

The fourth proportional to 117,288.81, 161,856.79 and 66,299.74 is: 91,492.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,288.81 : 161,856.79 = 66,299.74 : x
  2. Step 2: Convert to fraction form
    117,288.81/161,856.79 = 66,299.74/x
  3. Step 3: Cross multiply
    117,288.81x = 161,856.79 × 66,299.74
  4. Step 4: Simplify right side
    117,288.81x = 10,731,063,094.23
  5. Step 5: Solve for x
    x = 10,731,063,094.23/117,288.81
  6. Step 6: Final answer
    x = 91,492.64

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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.