Home / 78,289.36-117,434.28-55,019.92

Finding the Fourth Proportional to 78,289.36, 117,434.28 and 55,019.92

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Solution

The fourth proportional to 78,289.36, 117,434.28 and 55,019.92 is: 82,530.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,289.36 : 117,434.28 = 55,019.92 : x
  2. Step 2: Convert to fraction form
    78,289.36/117,434.28 = 55,019.92/x
  3. Step 3: Cross multiply
    78,289.36x = 117,434.28 × 55,019.92
  4. Step 4: Simplify right side
    78,289.36x = 6,461,224,690.86
  5. Step 5: Solve for x
    x = 6,461,224,690.86/78,289.36
  6. Step 6: Final answer
    x = 82,530.05

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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.