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Finding the Fourth Proportional to 249,428.70, 374,290.56 and 91,767.78

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Solution

The fourth proportional to 249,428.70, 374,290.56 and 91,767.78 is: 137,705.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,428.70 : 374,290.56 = 91,767.78 : x
  2. Step 2: Convert to fraction form
    249,428.70/374,290.56 = 91,767.78/x
  3. Step 3: Cross multiply
    249,428.70x = 374,290.56 × 91,767.78
  4. Step 4: Simplify right side
    249,428.70x = 34,347,813,766.16
  5. Step 5: Solve for x
    x = 34,347,813,766.16/249,428.70
  6. Step 6: Final answer
    x = 137,705.94

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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.