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Finding the Fourth Proportional to 275,973.60, 413,960.40 and 78,981.60

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Solution

The fourth proportional to 275,973.60, 413,960.40 and 78,981.60 is: 118,472.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,973.60 : 413,960.40 = 78,981.60 : x
  2. Step 2: Convert to fraction form
    275,973.60/413,960.40 = 78,981.60/x
  3. Step 3: Cross multiply
    275,973.60x = 413,960.40 × 78,981.60
  4. Step 4: Simplify right side
    275,973.60x = 32,695,254,728.64
  5. Step 5: Solve for x
    x = 32,695,254,728.64/275,973.60
  6. Step 6: Final answer
    x = 118,472.40

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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.