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Finding the Fourth Proportional to 114,740.40, 172,110.60 and 77,415.60

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Solution

The fourth proportional to 114,740.40, 172,110.60 and 77,415.60 is: 116,123.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,740.40 : 172,110.60 = 77,415.60 : x
  2. Step 2: Convert to fraction form
    114,740.40/172,110.60 = 77,415.60/x
  3. Step 3: Cross multiply
    114,740.40x = 172,110.60 × 77,415.60
  4. Step 4: Simplify right side
    114,740.40x = 13,324,045,365.36
  5. Step 5: Solve for x
    x = 13,324,045,365.36/114,740.40
  6. Step 6: Final answer
    x = 116,123.40

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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.