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Finding the Fourth Proportional to 114,436.80, 171,655.20 and 79,007.40

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Solution

The fourth proportional to 114,436.80, 171,655.20 and 79,007.40 is: 118,511.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,436.80 : 171,655.20 = 79,007.40 : x
  2. Step 2: Convert to fraction form
    114,436.80/171,655.20 = 79,007.40/x
  3. Step 3: Cross multiply
    114,436.80x = 171,655.20 × 79,007.40
  4. Step 4: Simplify right side
    114,436.80x = 13,562,031,048.48
  5. Step 5: Solve for x
    x = 13,562,031,048.48/114,436.80
  6. Step 6: Final answer
    x = 118,511.10

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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.