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Finding the Fourth Proportional to 91,001.70, 136,502.55 and 85,096.80

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Solution

The fourth proportional to 91,001.70, 136,502.55 and 85,096.80 is: 127,645.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,001.70 : 136,502.55 = 85,096.80 : x
  2. Step 2: Convert to fraction form
    91,001.70/136,502.55 = 85,096.80/x
  3. Step 3: Cross multiply
    91,001.70x = 136,502.55 × 85,096.80
  4. Step 4: Simplify right side
    91,001.70x = 11,615,930,196.84
  5. Step 5: Solve for x
    x = 11,615,930,196.84/91,001.70
  6. Step 6: Final answer
    x = 127,645.20

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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.