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Finding the Fourth Proportional to 218,418.76, 301,427.59 and 122,931.64

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Solution

The fourth proportional to 218,418.76, 301,427.59 and 122,931.64 is: 169,651.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,418.76 : 301,427.59 = 122,931.64 : x
  2. Step 2: Convert to fraction form
    218,418.76/301,427.59 = 122,931.64/x
  3. Step 3: Cross multiply
    218,418.76x = 301,427.59 × 122,931.64
  4. Step 4: Simplify right side
    218,418.76x = 37,054,987,365.29
  5. Step 5: Solve for x
    x = 37,054,987,365.29/218,418.76
  6. Step 6: Final answer
    x = 169,651.12

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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.