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Finding the Fourth Proportional to 118,562.88, 177,646.88 and 83,428.72

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Solution

The fourth proportional to 118,562.88, 177,646.88 and 83,428.72 is: 125,004.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,562.88 : 177,646.88 = 83,428.72 : x
  2. Step 2: Convert to fraction form
    118,562.88/177,646.88 = 83,428.72/x
  3. Step 3: Cross multiply
    118,562.88x = 177,646.88 × 83,428.72
  4. Step 4: Simplify right side
    118,562.88x = 14,820,851,810.39
  5. Step 5: Solve for x
    x = 14,820,851,810.39/118,562.88
  6. Step 6: Final answer
    x = 125,004.15

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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.