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Finding the Fourth Proportional to 128,814.62, 177,730.54 and 74,353.46

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Solution

The fourth proportional to 128,814.62, 177,730.54 and 74,353.46 is: 102,588.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,814.62 : 177,730.54 = 74,353.46 : x
  2. Step 2: Convert to fraction form
    128,814.62/177,730.54 = 74,353.46/x
  3. Step 3: Cross multiply
    128,814.62x = 177,730.54 × 74,353.46
  4. Step 4: Simplify right side
    128,814.62x = 13,214,879,522.13
  5. Step 5: Solve for x
    x = 13,214,879,522.13/128,814.62
  6. Step 6: Final answer
    x = 102,588.36

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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.