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Finding the Fourth Proportional to 81,101.58, 111,929.70 and 67,465.55

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Solution

The fourth proportional to 81,101.58, 111,929.70 and 67,465.55 is: 93,110.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,101.58 : 111,929.70 = 67,465.55 : x
  2. Step 2: Convert to fraction form
    81,101.58/111,929.70 = 67,465.55/x
  3. Step 3: Cross multiply
    81,101.58x = 111,929.70 × 67,465.55
  4. Step 4: Simplify right side
    81,101.58x = 7,551,398,212.19
  5. Step 5: Solve for x
    x = 7,551,398,212.19/81,101.58
  6. Step 6: Final answer
    x = 93,110.37

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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.