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Finding the Fourth Proportional to 85,220.62, 127,509.53 and 50,899.15

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Solution

The fourth proportional to 85,220.62, 127,509.53 and 50,899.15 is: 76,156.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,220.62 : 127,509.53 = 50,899.15 : x
  2. Step 2: Convert to fraction form
    85,220.62/127,509.53 = 50,899.15/x
  3. Step 3: Cross multiply
    85,220.62x = 127,509.53 × 50,899.15
  4. Step 4: Simplify right side
    85,220.62x = 6,490,126,598.79
  5. Step 5: Solve for x
    x = 6,490,126,598.79/85,220.62
  6. Step 6: Final answer
    x = 76,156.77

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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.