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Finding the Fourth Proportional to 52,099.88, 78,149.82 and 12,656.72

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Solution

The fourth proportional to 52,099.88, 78,149.82 and 12,656.72 is: 18,985.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,099.88 : 78,149.82 = 12,656.72 : x
  2. Step 2: Convert to fraction form
    52,099.88/78,149.82 = 12,656.72/x
  3. Step 3: Cross multiply
    52,099.88x = 78,149.82 × 12,656.72
  4. Step 4: Simplify right side
    52,099.88x = 989,120,389.79
  5. Step 5: Solve for x
    x = 989,120,389.79/52,099.88
  6. Step 6: Final answer
    x = 18,985.08

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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.