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Finding the Fourth Proportional to 100,808.35, 151,212.53 and 77,480.35

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Solution

The fourth proportional to 100,808.35, 151,212.53 and 77,480.35 is: 116,220.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,808.35 : 151,212.53 = 77,480.35 : x
  2. Step 2: Convert to fraction form
    100,808.35/151,212.53 = 77,480.35/x
  3. Step 3: Cross multiply
    100,808.35x = 151,212.53 × 77,480.35
  4. Step 4: Simplify right side
    100,808.35x = 11,715,999,361.38
  5. Step 5: Solve for x
    x = 11,715,999,361.38/100,808.35
  6. Step 6: Final answer
    x = 116,220.53

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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.