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Finding the Fourth Proportional to 104,911.40, 156,983.10 and 77,263.40

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Solution

The fourth proportional to 104,911.40, 156,983.10 and 77,263.40 is: 115,612.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,911.40 : 156,983.10 = 77,263.40 : x
  2. Step 2: Convert to fraction form
    104,911.40/156,983.10 = 77,263.40/x
  3. Step 3: Cross multiply
    104,911.40x = 156,983.10 × 77,263.40
  4. Step 4: Simplify right side
    104,911.40x = 12,129,048,048.54
  5. Step 5: Solve for x
    x = 12,129,048,048.54/104,911.40
  6. Step 6: Final answer
    x = 115,612.30

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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.