Home / 90,877.14-125,431.13-58,990.68

Finding the Fourth Proportional to 90,877.14, 125,431.13 and 58,990.68

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Solution

The fourth proportional to 90,877.14, 125,431.13 and 58,990.68 is: 81,420.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,877.14 : 125,431.13 = 58,990.68 : x
  2. Step 2: Convert to fraction form
    90,877.14/125,431.13 = 58,990.68/x
  3. Step 3: Cross multiply
    90,877.14x = 125,431.13 × 58,990.68
  4. Step 4: Simplify right side
    90,877.14x = 7,399,267,799.35
  5. Step 5: Solve for x
    x = 7,399,267,799.35/90,877.14
  6. Step 6: Final answer
    x = 81,420.56

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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.