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Finding the Fourth Proportional to 151,445.16, 208,991.44 and 87,788.88

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Solution

The fourth proportional to 151,445.16, 208,991.44 and 87,788.88 is: 121,146.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,445.16 : 208,991.44 = 87,788.88 : x
  2. Step 2: Convert to fraction form
    151,445.16/208,991.44 = 87,788.88/x
  3. Step 3: Cross multiply
    151,445.16x = 208,991.44 × 87,788.88
  4. Step 4: Simplify right side
    151,445.16x = 18,347,124,447.19
  5. Step 5: Solve for x
    x = 18,347,124,447.19/151,445.16
  6. Step 6: Final answer
    x = 121,146.98

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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.