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Finding the Fourth Proportional to 128,622.92, 177,495.48 and 71,259.88

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Solution

The fourth proportional to 128,622.92, 177,495.48 and 71,259.88 is: 98,336.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,622.92 : 177,495.48 = 71,259.88 : x
  2. Step 2: Convert to fraction form
    128,622.92/177,495.48 = 71,259.88/x
  3. Step 3: Cross multiply
    128,622.92x = 177,495.48 × 71,259.88
  4. Step 4: Simplify right side
    128,622.92x = 12,648,306,605.34
  5. Step 5: Solve for x
    x = 12,648,306,605.34/128,622.92
  6. Step 6: Final answer
    x = 98,336.34

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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.