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Finding the Fourth Proportional to 212,094.76, 318,142.14 and 85,790.92

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Solution

The fourth proportional to 212,094.76, 318,142.14 and 85,790.92 is: 128,686.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,094.76 : 318,142.14 = 85,790.92 : x
  2. Step 2: Convert to fraction form
    212,094.76/318,142.14 = 85,790.92/x
  3. Step 3: Cross multiply
    212,094.76x = 318,142.14 × 85,790.92
  4. Step 4: Simplify right side
    212,094.76x = 27,293,706,881.37
  5. Step 5: Solve for x
    x = 27,293,706,881.37/212,094.76
  6. Step 6: Final answer
    x = 128,686.38

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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.