Home / 118,548.72-163,334.68-78,191.28

Finding the Fourth Proportional to 118,548.72, 163,334.68 and 78,191.28

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Solution

The fourth proportional to 118,548.72, 163,334.68 and 78,191.28 is: 107,730.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,548.72 : 163,334.68 = 78,191.28 : x
  2. Step 2: Convert to fraction form
    118,548.72/163,334.68 = 78,191.28/x
  3. Step 3: Cross multiply
    118,548.72x = 163,334.68 × 78,191.28
  4. Step 4: Simplify right side
    118,548.72x = 12,771,347,697.59
  5. Step 5: Solve for x
    x = 12,771,347,697.59/118,548.72
  6. Step 6: Final answer
    x = 107,730.79

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1.5x scale

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.