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Finding the Fourth Proportional to 249,646.20, 374,469.30 and 91,987.80

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Solution

The fourth proportional to 249,646.20, 374,469.30 and 91,987.80 is: 137,981.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,646.20 : 374,469.30 = 91,987.80 : x
  2. Step 2: Convert to fraction form
    249,646.20/374,469.30 = 91,987.80/x
  3. Step 3: Cross multiply
    249,646.20x = 374,469.30 × 91,987.80
  4. Step 4: Simplify right side
    249,646.20x = 34,446,607,074.54
  5. Step 5: Solve for x
    x = 34,446,607,074.54/249,646.20
  6. Step 6: Final answer
    x = 137,981.70

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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.