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Finding the Fourth Proportional to 254,235.90, 381,115.08 and 85,638.24

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Solution

The fourth proportional to 254,235.90, 381,115.08 and 85,638.24 is: 128,376.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,235.90 : 381,115.08 = 85,638.24 : x
  2. Step 2: Convert to fraction form
    254,235.90/381,115.08 = 85,638.24/x
  3. Step 3: Cross multiply
    254,235.90x = 381,115.08 × 85,638.24
  4. Step 4: Simplify right side
    254,235.90x = 32,638,024,688.66
  5. Step 5: Solve for x
    x = 32,638,024,688.66/254,235.90
  6. Step 6: Final answer
    x = 128,376.93

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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.