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Finding the Fourth Proportional to 103,189.67, 142,349.28 and 67,400.63

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Solution

The fourth proportional to 103,189.67, 142,349.28 and 67,400.63 is: 92,978.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,189.67 : 142,349.28 = 67,400.63 : x
  2. Step 2: Convert to fraction form
    103,189.67/142,349.28 = 67,400.63/x
  3. Step 3: Cross multiply
    103,189.67x = 142,349.28 × 67,400.63
  4. Step 4: Simplify right side
    103,189.67x = 9,594,431,152.05
  5. Step 5: Solve for x
    x = 9,594,431,152.05/103,189.67
  6. Step 6: Final answer
    x = 92,978.60

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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.