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Finding the Fourth Proportional to 249,791.85, 374,691.35 and 81,313.07

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Solution

The fourth proportional to 249,791.85, 374,691.35 and 81,313.07 is: 121,970.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,791.85 : 374,691.35 = 81,313.07 : x
  2. Step 2: Convert to fraction form
    249,791.85/374,691.35 = 81,313.07/x
  3. Step 3: Cross multiply
    249,791.85x = 374,691.35 × 81,313.07
  4. Step 4: Simplify right side
    249,791.85x = 30,467,302,300.77
  5. Step 5: Solve for x
    x = 30,467,302,300.77/249,791.85
  6. Step 6: Final answer
    x = 121,970.76

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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.