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Finding the Fourth Proportional to 118,087.62, 176,348.70 and 103,779.78

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Solution

The fourth proportional to 118,087.62, 176,348.70 and 103,779.78 is: 154,981.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,087.62 : 176,348.70 = 103,779.78 : x
  2. Step 2: Convert to fraction form
    118,087.62/176,348.70 = 103,779.78/x
  3. Step 3: Cross multiply
    118,087.62x = 176,348.70 × 103,779.78
  4. Step 4: Simplify right side
    118,087.62x = 18,301,429,289.29
  5. Step 5: Solve for x
    x = 18,301,429,289.29/118,087.62
  6. Step 6: Final answer
    x = 154,981.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.