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Finding the Fourth Proportional to 215,423, 297,090.20 and 134,857.86

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Solution

The fourth proportional to 215,423, 297,090.20 and 134,857.86 is: 185,982.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,423 : 297,090.20 = 134,857.86 : x
  2. Step 2: Convert to fraction form
    215,423/297,090.20 = 134,857.86/x
  3. Step 3: Cross multiply
    215,423x = 297,090.20 × 134,857.86
  4. Step 4: Simplify right side
    215,423x = 40,064,948,598.97
  5. Step 5: Solve for x
    x = 40,064,948,598.97/215,423
  6. Step 6: Final answer
    x = 185,982.69

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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.