Home / 81,265.40-121,898.10-74,007.80

Finding the Fourth Proportional to 81,265.40, 121,898.10 and 74,007.80

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Solution

The fourth proportional to 81,265.40, 121,898.10 and 74,007.80 is: 111,011.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,265.40 : 121,898.10 = 74,007.80 : x
  2. Step 2: Convert to fraction form
    81,265.40/121,898.10 = 74,007.80/x
  3. Step 3: Cross multiply
    81,265.40x = 121,898.10 × 74,007.80
  4. Step 4: Simplify right side
    81,265.40x = 9,021,410,205.18
  5. Step 5: Solve for x
    x = 9,021,410,205.18/81,265.40
  6. Step 6: Final answer
    x = 111,011.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.