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Finding the Fourth Proportional to 150,507.69, 207,706.97 and 85,987.55

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Solution

The fourth proportional to 150,507.69, 207,706.97 and 85,987.55 is: 118,666.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,507.69 : 207,706.97 = 85,987.55 : x
  2. Step 2: Convert to fraction form
    150,507.69/207,706.97 = 85,987.55/x
  3. Step 3: Cross multiply
    150,507.69x = 207,706.97 × 85,987.55
  4. Step 4: Simplify right side
    150,507.69x = 17,860,212,644.66
  5. Step 5: Solve for x
    x = 17,860,212,644.66/150,507.69
  6. Step 6: Final answer
    x = 118,666.45

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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.