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Finding the Fourth Proportional to 117,690.90, 176,480.73 and 42,758.79

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Solution

The fourth proportional to 117,690.90, 176,480.73 and 42,758.79 is: 64,117.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,690.90 : 176,480.73 = 42,758.79 : x
  2. Step 2: Convert to fraction form
    117,690.90/176,480.73 = 42,758.79/x
  3. Step 3: Cross multiply
    117,690.90x = 176,480.73 × 42,758.79
  4. Step 4: Simplify right side
    117,690.90x = 7,546,102,473.12
  5. Step 5: Solve for x
    x = 7,546,102,473.12/117,690.90
  6. Step 6: Final answer
    x = 64,117.98

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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.