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Finding the Fourth Proportional to 210,102.60, 315,111.38 and 76,937.39

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Solution

The fourth proportional to 210,102.60, 315,111.38 and 76,937.39 is: 115,390.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,102.60 : 315,111.38 = 76,937.39 : x
  2. Step 2: Convert to fraction form
    210,102.60/315,111.38 = 76,937.39/x
  3. Step 3: Cross multiply
    210,102.60x = 315,111.38 × 76,937.39
  4. Step 4: Simplify right side
    210,102.60x = 24,243,847,136.50
  5. Step 5: Solve for x
    x = 24,243,847,136.50/210,102.60
  6. Step 6: Final answer
    x = 115,390.51

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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.