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Finding the Fourth Proportional to 150,459.61, 207,640.63 and 85,939.47

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Solution

The fourth proportional to 150,459.61, 207,640.63 and 85,939.47 is: 118,600.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,459.61 : 207,640.63 = 85,939.47 : x
  2. Step 2: Convert to fraction form
    150,459.61/207,640.63 = 85,939.47/x
  3. Step 3: Cross multiply
    150,459.61x = 207,640.63 × 85,939.47
  4. Step 4: Simplify right side
    150,459.61x = 17,844,525,692.67
  5. Step 5: Solve for x
    x = 17,844,525,692.67/150,459.61
  6. Step 6: Final answer
    x = 118,600.11

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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.