Home / 91,217.86-125,811.37-78,492.36

Finding the Fourth Proportional to 91,217.86, 125,811.37 and 78,492.36

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Solution

The fourth proportional to 91,217.86, 125,811.37 and 78,492.36 is: 108,259.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,217.86 : 125,811.37 = 78,492.36 : x
  2. Step 2: Convert to fraction form
    91,217.86/125,811.37 = 78,492.36/x
  3. Step 3: Cross multiply
    91,217.86x = 125,811.37 × 78,492.36
  4. Step 4: Simplify right side
    91,217.86x = 9,875,231,346.13
  5. Step 5: Solve for x
    x = 9,875,231,346.13/91,217.86
  6. Step 6: Final answer
    x = 108,259.84

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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.