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Finding the Fourth Proportional to 100,699.59, 150,920.19 and 85,088.46

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Solution

The fourth proportional to 100,699.59, 150,920.19 and 85,088.46 is: 127,523.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,699.59 : 150,920.19 = 85,088.46 : x
  2. Step 2: Convert to fraction form
    100,699.59/150,920.19 = 85,088.46/x
  3. Step 3: Cross multiply
    100,699.59x = 150,920.19 × 85,088.46
  4. Step 4: Simplify right side
    100,699.59x = 12,841,566,550.01
  5. Step 5: Solve for x
    x = 12,841,566,550.01/100,699.59
  6. Step 6: Final answer
    x = 127,523.52

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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.