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Finding the Fourth Proportional to 249,428.63, 374,179.91 and 91,644.78

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Solution

The fourth proportional to 249,428.63, 374,179.91 and 91,644.78 is: 137,480.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,428.63 : 374,179.91 = 91,644.78 : x
  2. Step 2: Convert to fraction form
    249,428.63/374,179.91 = 91,644.78/x
  3. Step 3: Cross multiply
    249,428.63x = 374,179.91 × 91,644.78
  4. Step 4: Simplify right side
    249,428.63x = 34,291,635,074.15
  5. Step 5: Solve for x
    x = 34,291,635,074.15/249,428.63
  6. Step 6: Final answer
    x = 137,480.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.