Home / 81,528.22-122,271.81-31,591.18

Finding the Fourth Proportional to 81,528.22, 122,271.81 and 31,591.18

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Solution

The fourth proportional to 81,528.22, 122,271.81 and 31,591.18 is: 47,378.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,528.22 : 122,271.81 = 31,591.18 : x
  2. Step 2: Convert to fraction form
    81,528.22/122,271.81 = 31,591.18/x
  3. Step 3: Cross multiply
    81,528.22x = 122,271.81 × 31,591.18
  4. Step 4: Simplify right side
    81,528.22x = 3,862,710,758.64
  5. Step 5: Solve for x
    x = 3,862,710,758.64/81,528.22
  6. Step 6: Final answer
    x = 47,378.82

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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.