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Finding the Fourth Proportional to 78,117.72, 117,176.58 and 18,952.44

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Solution

The fourth proportional to 78,117.72, 117,176.58 and 18,952.44 is: 28,428.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,117.72 : 117,176.58 = 18,952.44 : x
  2. Step 2: Convert to fraction form
    78,117.72/117,176.58 = 18,952.44/x
  3. Step 3: Cross multiply
    78,117.72x = 117,176.58 × 18,952.44
  4. Step 4: Simplify right side
    78,117.72x = 2,220,782,101.86
  5. Step 5: Solve for x
    x = 2,220,782,101.86/78,117.72
  6. Step 6: Final answer
    x = 28,428.66

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1.5x scale

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.