Home / 145,811.50-201,219.88-78,743.50

Finding the Fourth Proportional to 145,811.50, 201,219.88 and 78,743.50

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Solution

The fourth proportional to 145,811.50, 201,219.88 and 78,743.50 is: 108,666.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,811.50 : 201,219.88 = 78,743.50 : x
  2. Step 2: Convert to fraction form
    145,811.50/201,219.88 = 78,743.50/x
  3. Step 3: Cross multiply
    145,811.50x = 201,219.88 × 78,743.50
  4. Step 4: Simplify right side
    145,811.50x = 15,844,757,620.78
  5. Step 5: Solve for x
    x = 15,844,757,620.78/145,811.50
  6. Step 6: Final answer
    x = 108,666.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.