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Finding the Fourth Proportional to 279,071.82, 385,123.95 and 151,748.19

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Solution

The fourth proportional to 279,071.82, 385,123.95 and 151,748.19 is: 209,415.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,071.82 : 385,123.95 = 151,748.19 : x
  2. Step 2: Convert to fraction form
    279,071.82/385,123.95 = 151,748.19/x
  3. Step 3: Cross multiply
    279,071.82x = 385,123.95 × 151,748.19
  4. Step 4: Simplify right side
    279,071.82x = 58,441,862,338.15
  5. Step 5: Solve for x
    x = 58,441,862,338.15/279,071.82
  6. Step 6: Final answer
    x = 209,415.13

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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.