Home / 81,123.10-111,948.68-45,313.64

Finding the Fourth Proportional to 81,123.10, 111,948.68 and 45,313.64

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Solution

The fourth proportional to 81,123.10, 111,948.68 and 45,313.64 is: 62,532.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,123.10 : 111,948.68 = 45,313.64 : x
  2. Step 2: Convert to fraction form
    81,123.10/111,948.68 = 45,313.64/x
  3. Step 3: Cross multiply
    81,123.10x = 111,948.68 × 45,313.64
  4. Step 4: Simplify right side
    81,123.10x = 5,072,802,184.00
  5. Step 5: Solve for x
    x = 5,072,802,184.00/81,123.10
  6. Step 6: Final answer
    x = 62,532.15

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1.5x scale

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.