Home / 90,645.68-135,759.85-77,851.73

Finding the Fourth Proportional to 90,645.68, 135,759.85 and 77,851.73

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Solution

The fourth proportional to 90,645.68, 135,759.85 and 77,851.73 is: 116,598.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,645.68 : 135,759.85 = 77,851.73 : x
  2. Step 2: Convert to fraction form
    90,645.68/135,759.85 = 77,851.73/x
  3. Step 3: Cross multiply
    90,645.68x = 135,759.85 × 77,851.73
  4. Step 4: Simplify right side
    90,645.68x = 10,569,139,331.81
  5. Step 5: Solve for x
    x = 10,569,139,331.81/90,645.68
  6. Step 6: Final answer
    x = 116,598.38

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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.