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Finding the Fourth Proportional to 357,128.40, 535,712.04 and 107,803.92

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Solution

The fourth proportional to 357,128.40, 535,712.04 and 107,803.92 is: 161,711.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,128.40 : 535,712.04 = 107,803.92 : x
  2. Step 2: Convert to fraction form
    357,128.40/535,712.04 = 107,803.92/x
  3. Step 3: Cross multiply
    357,128.40x = 535,712.04 × 107,803.92
  4. Step 4: Simplify right side
    357,128.40x = 57,751,857,903.20
  5. Step 5: Solve for x
    x = 57,751,857,903.20/357,128.40
  6. Step 6: Final answer
    x = 161,711.75

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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.