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Finding the Fourth Proportional to 219,299.50, 302,635.86 and 128,657.02

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Solution

The fourth proportional to 219,299.50, 302,635.86 and 128,657.02 is: 177,548.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,299.50 : 302,635.86 = 128,657.02 : x
  2. Step 2: Convert to fraction form
    219,299.50/302,635.86 = 128,657.02/x
  3. Step 3: Cross multiply
    219,299.50x = 302,635.86 × 128,657.02
  4. Step 4: Simplify right side
    219,299.50x = 38,936,227,892.74
  5. Step 5: Solve for x
    x = 38,936,227,892.74/219,299.50
  6. Step 6: Final answer
    x = 177,548.18

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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.