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Finding the Fourth Proportional to 289,203.72, 433,792.80 and 78,841.68

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Solution

The fourth proportional to 289,203.72, 433,792.80 and 78,841.68 is: 118,259.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,203.72 : 433,792.80 = 78,841.68 : x
  2. Step 2: Convert to fraction form
    289,203.72/433,792.80 = 78,841.68/x
  3. Step 3: Cross multiply
    289,203.72x = 433,792.80 × 78,841.68
  4. Step 4: Simplify right side
    289,203.72x = 34,200,953,123.90
  5. Step 5: Solve for x
    x = 34,200,953,123.90/289,203.72
  6. Step 6: Final answer
    x = 118,259.04

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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.