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Finding the Fourth Proportional to 152,697.78, 210,722.98 and 85,629.78

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Solution

The fourth proportional to 152,697.78, 210,722.98 and 85,629.78 is: 118,169.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,697.78 : 210,722.98 = 85,629.78 : x
  2. Step 2: Convert to fraction form
    152,697.78/210,722.98 = 85,629.78/x
  3. Step 3: Cross multiply
    152,697.78x = 210,722.98 × 85,629.78
  4. Step 4: Simplify right side
    152,697.78x = 18,044,162,418.34
  5. Step 5: Solve for x
    x = 18,044,162,418.34/152,697.78
  6. Step 6: Final answer
    x = 118,169.12

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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.