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Finding the Fourth Proportional to 124,431.40, 171,646 and 86,213.32

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Solution

The fourth proportional to 124,431.40, 171,646 and 86,213.32 is: 118,926.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,431.40 : 171,646 = 86,213.32 : x
  2. Step 2: Convert to fraction form
    124,431.40/171,646 = 86,213.32/x
  3. Step 3: Cross multiply
    124,431.40x = 171,646 × 86,213.32
  4. Step 4: Simplify right side
    124,431.40x = 14,798,171,524.72
  5. Step 5: Solve for x
    x = 14,798,171,524.72/124,431.40
  6. Step 6: Final answer
    x = 118,926.34

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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.