Home / 81,440.00-121,602.96-72,951.70

Finding the Fourth Proportional to 81,440.00, 121,602.96 and 72,951.70

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Solution

The fourth proportional to 81,440.00, 121,602.96 and 72,951.70 is: 108,928.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,440.00 : 121,602.96 = 72,951.70 : x
  2. Step 2: Convert to fraction form
    81,440.00/121,602.96 = 72,951.70/x
  3. Step 3: Cross multiply
    81,440.00x = 121,602.96 × 72,951.70
  4. Step 4: Simplify right side
    81,440.00x = 8,871,142,353.02
  5. Step 5: Solve for x
    x = 8,871,142,353.02/81,440.00
  6. Step 6: Final answer
    x = 108,928.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.