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Finding the Fourth Proportional to 208,785.50, 313,024.90 and 66,548.89

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Solution

The fourth proportional to 208,785.50, 313,024.90 and 66,548.89 is: 99,774.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,785.50 : 313,024.90 = 66,548.89 : x
  2. Step 2: Convert to fraction form
    208,785.50/313,024.90 = 66,548.89/x
  3. Step 3: Cross multiply
    208,785.50x = 313,024.90 × 66,548.89
  4. Step 4: Simplify right side
    208,785.50x = 20,831,457,739.49
  5. Step 5: Solve for x
    x = 20,831,457,739.49/208,785.50
  6. Step 6: Final answer
    x = 99,774.45

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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.