Home / 81,720.40-122,518.24-42,252.32

Finding the Fourth Proportional to 81,720.40, 122,518.24 and 42,252.32

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Solution

The fourth proportional to 81,720.40, 122,518.24 and 42,252.32 is: 63,346.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,720.40 : 122,518.24 = 42,252.32 : x
  2. Step 2: Convert to fraction form
    81,720.40/122,518.24 = 42,252.32/x
  3. Step 3: Cross multiply
    81,720.40x = 122,518.24 × 42,252.32
  4. Step 4: Simplify right side
    81,720.40x = 5,176,679,882.32
  5. Step 5: Solve for x
    x = 5,176,679,882.32/81,720.40
  6. Step 6: Final answer
    x = 63,346.24

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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.