Home / 81,122.60-111,948-45,313.13

Finding the Fourth Proportional to 81,122.60, 111,948 and 45,313.13

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Solution

The fourth proportional to 81,122.60, 111,948 and 45,313.13 is: 62,531.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,122.60 : 111,948 = 45,313.13 : x
  2. Step 2: Convert to fraction form
    81,122.60/111,948 = 45,313.13/x
  3. Step 3: Cross multiply
    81,122.60x = 111,948 × 45,313.13
  4. Step 4: Simplify right side
    81,122.60x = 5,072,714,277.24
  5. Step 5: Solve for x
    x = 5,072,714,277.24/81,122.60
  6. Step 6: Final answer
    x = 62,531.46

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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.