Home / 78,489.18-117,733.60-64,581.92

Finding the Fourth Proportional to 78,489.18, 117,733.60 and 64,581.92

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Solution

The fourth proportional to 78,489.18, 117,733.60 and 64,581.92 is: 96,872.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,489.18 : 117,733.60 = 64,581.92 : x
  2. Step 2: Convert to fraction form
    78,489.18/117,733.60 = 64,581.92/x
  3. Step 3: Cross multiply
    78,489.18x = 117,733.60 × 64,581.92
  4. Step 4: Simplify right side
    78,489.18x = 7,603,461,936.51
  5. Step 5: Solve for x
    x = 7,603,461,936.51/78,489.18
  6. Step 6: Final answer
    x = 96,872.74

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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.