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Finding the Fourth Proportional to 133,317.48, 183,978.30 and 76,728.84

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Solution

The fourth proportional to 133,317.48, 183,978.30 and 76,728.84 is: 105,885.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,317.48 : 183,978.30 = 76,728.84 : x
  2. Step 2: Convert to fraction form
    133,317.48/183,978.30 = 76,728.84/x
  3. Step 3: Cross multiply
    133,317.48x = 183,978.30 × 76,728.84
  4. Step 4: Simplify right side
    133,317.48x = 14,116,441,544.17
  5. Step 5: Solve for x
    x = 14,116,441,544.17/133,317.48
  6. Step 6: Final answer
    x = 105,885.90

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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.