Home / 81,018.28-111,810.76-45,215.20

Finding the Fourth Proportional to 81,018.28, 111,810.76 and 45,215.20

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Solution

The fourth proportional to 81,018.28, 111,810.76 and 45,215.20 is: 62,400.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,018.28 : 111,810.76 = 45,215.20 : x
  2. Step 2: Convert to fraction form
    81,018.28/111,810.76 = 45,215.20/x
  3. Step 3: Cross multiply
    81,018.28x = 111,810.76 × 45,215.20
  4. Step 4: Simplify right side
    81,018.28x = 5,055,545,875.55
  5. Step 5: Solve for x
    x = 5,055,545,875.55/81,018.28
  6. Step 6: Final answer
    x = 62,400.06

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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.