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Finding the Fourth Proportional to 90,809.25, 125,316.90 and 51,065.25

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Solution

The fourth proportional to 90,809.25, 125,316.90 and 51,065.25 is: 70,470.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,809.25 : 125,316.90 = 51,065.25 : x
  2. Step 2: Convert to fraction form
    90,809.25/125,316.90 = 51,065.25/x
  3. Step 3: Cross multiply
    90,809.25x = 125,316.90 × 51,065.25
  4. Step 4: Simplify right side
    90,809.25x = 6,399,338,827.73
  5. Step 5: Solve for x
    x = 6,399,338,827.73/90,809.25
  6. Step 6: Final answer
    x = 70,470.12

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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.