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Finding the Fourth Proportional to 228,634.29, 315,526.64 and 137,988.81

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Solution

The fourth proportional to 228,634.29, 315,526.64 and 137,988.81 is: 190,431.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,634.29 : 315,526.64 = 137,988.81 : x
  2. Step 2: Convert to fraction form
    228,634.29/315,526.64 = 137,988.81/x
  3. Step 3: Cross multiply
    228,634.29x = 315,526.64 × 137,988.81
  4. Step 4: Simplify right side
    228,634.29x = 43,539,144,886.95
  5. Step 5: Solve for x
    x = 43,539,144,886.95/228,634.29
  6. Step 6: Final answer
    x = 190,431.39

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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.