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Finding the Fourth Proportional to 118,512.99, 163,657.67 and 76,145.94

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Solution

The fourth proportional to 118,512.99, 163,657.67 and 76,145.94 is: 105,151.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,512.99 : 163,657.67 = 76,145.94 : x
  2. Step 2: Convert to fraction form
    118,512.99/163,657.67 = 76,145.94/x
  3. Step 3: Cross multiply
    118,512.99x = 163,657.67 × 76,145.94
  4. Step 4: Simplify right side
    118,512.99x = 12,461,866,739.63
  5. Step 5: Solve for x
    x = 12,461,866,739.63/118,512.99
  6. Step 6: Final answer
    x = 105,151.91

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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.