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Finding the Fourth Proportional to 91,504.71, 136,648.13 and 90,515.09

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Solution

The fourth proportional to 91,504.71, 136,648.13 and 90,515.09 is: 135,170.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,504.71 : 136,648.13 = 90,515.09 : x
  2. Step 2: Convert to fraction form
    91,504.71/136,648.13 = 90,515.09/x
  3. Step 3: Cross multiply
    91,504.71x = 136,648.13 × 90,515.09
  4. Step 4: Simplify right side
    91,504.71x = 12,368,717,674.33
  5. Step 5: Solve for x
    x = 12,368,717,674.33/91,504.71
  6. Step 6: Final answer
    x = 135,170.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.