Home / 81,389.76-112,320-45,579.60

Finding the Fourth Proportional to 81,389.76, 112,320 and 45,579.60

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Solution

The fourth proportional to 81,389.76, 112,320 and 45,579.60 is: 62,901.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,389.76 : 112,320 = 45,579.60 : x
  2. Step 2: Convert to fraction form
    81,389.76/112,320 = 45,579.60/x
  3. Step 3: Cross multiply
    81,389.76x = 112,320 × 45,579.60
  4. Step 4: Simplify right side
    81,389.76x = 5,119,500,672
  5. Step 5: Solve for x
    x = 5,119,500,672/81,389.76
  6. Step 6: Final answer
    x = 62,901.04

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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.