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Finding the Fourth Proportional to 118,774.55, 177,913.93 and 71,238.89

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Solution

The fourth proportional to 118,774.55, 177,913.93 and 71,238.89 is: 106,709.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,774.55 : 177,913.93 = 71,238.89 : x
  2. Step 2: Convert to fraction form
    118,774.55/177,913.93 = 71,238.89/x
  3. Step 3: Cross multiply
    118,774.55x = 177,913.93 × 71,238.89
  4. Step 4: Simplify right side
    118,774.55x = 12,674,390,888.74
  5. Step 5: Solve for x
    x = 12,674,390,888.74/118,774.55
  6. Step 6: Final answer
    x = 106,709.65

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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.