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Finding the Fourth Proportional to 128,044.36, 176,706.42 and 71,454.28

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Solution

The fourth proportional to 128,044.36, 176,706.42 and 71,454.28 is: 98,609.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,044.36 : 176,706.42 = 71,454.28 : x
  2. Step 2: Convert to fraction form
    128,044.36/176,706.42 = 71,454.28/x
  3. Step 3: Cross multiply
    128,044.36x = 176,706.42 × 71,454.28
  4. Step 4: Simplify right side
    128,044.36x = 12,626,430,012.48
  5. Step 5: Solve for x
    x = 12,626,430,012.48/128,044.36
  6. Step 6: Final answer
    x = 98,609.81

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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.