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Finding the Fourth Proportional to 210,612.53, 315,974.19 and 75,690.23

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Solution

The fourth proportional to 210,612.53, 315,974.19 and 75,690.23 is: 113,555.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,612.53 : 315,974.19 = 75,690.23 : x
  2. Step 2: Convert to fraction form
    210,612.53/315,974.19 = 75,690.23/x
  3. Step 3: Cross multiply
    210,612.53x = 315,974.19 × 75,690.23
  4. Step 4: Simplify right side
    210,612.53x = 23,916,159,115.16
  5. Step 5: Solve for x
    x = 23,916,159,115.16/210,612.53
  6. Step 6: Final answer
    x = 113,555.25

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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.