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Finding the Fourth Proportional to 212,347.77, 318,519.23 and 85,953.62

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Solution

The fourth proportional to 212,347.77, 318,519.23 and 85,953.62 is: 128,929.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,347.77 : 318,519.23 = 85,953.62 : x
  2. Step 2: Convert to fraction form
    212,347.77/318,519.23 = 85,953.62/x
  3. Step 3: Cross multiply
    212,347.77x = 318,519.23 × 85,953.62
  4. Step 4: Simplify right side
    212,347.77x = 27,377,878,835.75
  5. Step 5: Solve for x
    x = 27,377,878,835.75/212,347.77
  6. Step 6: Final answer
    x = 128,929.44

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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.